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Results for Spring Detent Escapement

654 articles · 53 videos found · page 1 of 24

Highlights: Pocket Watches at Phillips Hong Kong SJX Watches
Patek Philippe Nov 14, 2025

Highlights: Pocket Watches at Phillips Hong Kong

The upcoming Phillips Hong Kong auction includes a diverse and spectacular selection of pocket watches spanning two centuries. From early 19th‑century enamel masterpieces crafted for the Chinese market to 20th‑century tourbillon chronometers that triumphed at observatory trials, the lots on offer demonstrate the technical and aesthetic evolution of the watch over the last two hundred years. Lot 1086 – S. Smith and Son No. 1899-1 Tourbillon Chronometer with Kew Class A Certificate Albert Pellaton-Favre constructed the first of two tourbillons in the auction, which was later retailed by S. Smith & Son. The other, by Patek Philippe, is the work of his son, Jämes-César Pellaton. Both are depicted in Reinhard Meis’s famous Das Tourbillon. The English and Swiss disagreed on what constitutes a chronometer. The English argued that a chronometer must use a chronometer (detent) escapement, while the Swiss considered any watch a chronometer if performed well enough – which the English would call a “Half-Chronometer”. As the Willis enamel dial boasts, the first is a chronometer by both English and Swiss reckoning, with a spring detent escapement and “Especially Good” certificate from the Kew Observatory. While S. Smith and Son retailed quite a number of tourbillons, including others with detent escapements, most were sourced locally, while the present lot uses a Swiss movement. The London branch of Baume Frères ordered six tourbillon chronometers from Albert Pella...

Explained: The Detent Escapement SJX Watches
Breguet s natural escapement May 8, 2024

Explained: The Detent Escapement

Among the many different escapement types, one in particular stands out, the detent escapement. Taking its name from détente, French for “trigger”, this system is often considered to be the purest type of escapement due to its efficiency and virtually lubrication-free operation. Any sort of mechanical clock or watch requires an escapement, a mechanism that transfers torque from the power source to the regulating organ. The escapement bridges the steady rotation of the gears in the going train and the oscillation of the balance. As a result, the escapement fulfils a double function, both maintaining the swing of the balance and regulating the discharge speed of the mainspring and going train. The detent escapement was invented in the second half of the 18th century,  somewhat simultaneously but independently by the English watchmakers Thomas Earnshaw (1749-1829) and John Arnold (1736-1799). A somewhat similar escapement was prototyped by the Frenchman Pierre Le Roy (1717–1785) some three decades earlier, but the modern detent escapement is derived mostly from Earnshaw’s design. Initially, the escapement was conceived for use in marine chronometers, explaining why it is also known as a chronometer escapement. The chronometer escapement also inspired many innovative subsequent escapements, like the Breguet’s natural escapement, the Robin escapement, and the Daniels co-axial. Drawings of detent escapement types taken from ‘The Marine Chronometer: Its History and ...

VIDEO: Grand Seiko’s Spring Drive technology explained … in 2 minutes Time+Tide
Grand Seiko s Spring Drive technology Oct 28, 2017

VIDEO: Grand Seiko’s Spring Drive technology explained … in 2 minutes

Fundamentally, there’s not a whole lot of variation in watch movements. Sure, the peripheral details might vary, but basically you’re either looking at a purely mechancial movement, with a mainspring and escapement setup that’s remained pretty much unchanged for the last few hundred years, or you’re looking at a battery-powered quartz watch that’s come to … ContinuedThe post VIDEO: Grand Seiko’s Spring Drive technology explained … in 2 minutes appeared first on Time+Tide Watches.

Hands On: Grand Seiko Spring Drive UFA Ushio 300 Diver SLGB025 and SLGB023 SJX Watches
Grand Seiko Spring Drive UFA Ushio Apr 27, 2026

Hands On: Grand Seiko Spring Drive UFA Ushio 300 Diver SLGB025 and SLGB023

At Watches & Wonders, Grand Seiko launched its best dive watch yet, the Evolution 9 Spring Drive Ultra Fine Accuracy (UFA) Ushio 300 Diver SLGB023 and SLGB025. As a product, it is both shocking and obvious, combining everything Grand Seiko collectors have longed for: a moderately sized case, an improved bracelet and clasp, and a 300 m depth rating. It all comes packaged in a titanium case and an enthusiast-favourite no-date format, and retails for slightly less than Grand Seiko’s existing premium dive watches. It’s a strong statement from a brand looking to gain traction in the luxury sports watch segment. Initial thoughts Seiko’s dive watch pedigree is one of the strongest in the industry, from their iconic saturation divers of the late 1960s to the gone but not forgotten SKX. Yet the flagship Grand Seiko brand has struggled to field a compelling dive watch. Bulky cases, strange proportions, odd depth ratings, and clumsy clasps held back past offerings. Fortunately, Grand Seiko has finally overcome these shortcomings and can finally boast a highly competitive diver’s watch. I made a wishlist for Watches & Wonders 2026 not long ago, at the top of which was my vision for a Grand Seiko UFA Spring Drive diver. To be clear, I’d already known a dive watch using the new cal. 9RBx family of Spring Drive movements was coming based on trademark filings, but I wished for something that many Grand Seiko collectors have wanted for years – a moderately sized dive watch, wit...

Watches & Wonders: Grand Seiko’s Nature-Inspired SBGZ011 Spring Drive Limited Release Shows The Shape of Water Worn & Wound
Grand Seiko s Nature-Inspired SBGZ011 Spring Apr 16, 2026

Watches & Wonders: Grand Seiko’s Nature-Inspired SBGZ011 Spring Drive Limited Release Shows The Shape of Water

Deep in the heart of a primeval forest lies a waterfall whose fresh spring waters are unspoilt by man, and whose mystic beauty is an endless source of inspiration - for the band of artisans who quietly engrave by hand some of the most intricately detailed watches in the world. It’s not a Studio Ghibli movie: the Tateshina Falls are real, located in central Japan’s Nagano Prefecture, which is also home to Grand Seiko’s Micro Artist Studio. And at Watches and Wonders 2026, a limited release pays tribute to this serene locale with a Spring Drive model that, according to Grand Seiko, “conveys time’s eternal flow in nature.”  The Masterpiece Collection SBGZ011 takes Grand Seiko’s sharp-edged 44GS case - rendered in platinum - and imbues it with hand-engraved lines from lug to lug, around the bezel, and entirely within the dial (save for a thin minute ring). These dashed silver lines flow in colliding swirls, bursting forth and blending into each other with seeming chaos; Grand Seiko suggests that they represent spring water bubbling forth from below the earth’s surface. On the bezel and the case’s flat surfaces and intersecting ridges, the patterns appear even more dramatic, resembling petals of a monochromatic flower. And on the dial, the white-gold hands and markers provide smooth, brilliant contrast, while the Grand Seiko and Spring Drive logos are carved and inset in their own boxes.  The manual-winding Caliber 9R02 is Grand Seiko’s thinnest Spri...

Three New Grand Seiko Spring Drive Models For Watches And Wonders 2026 - The SBGY043, SBGD228, And SBGZ011 Fratello
Grand Seiko Spring Drive Models Apr 14, 2026

Three New Grand Seiko Spring Drive Models For Watches And Wonders 2026 - The SBGY043, SBGD228, And SBGZ011

The Grand Seiko Spring Drive family takes center stage at Watches and Wonders 2026 with three new releases. From the SBGY043, a relatively restrained daily wearer, to the SBGD228, a full-blown jewelry watch, this beloved Japanese brand covers a wide spectrum while sticking to its unique design ethos. What stands out this year is how […] Visit Three New Grand Seiko Spring Drive Models For Watches And Wonders 2026 - The SBGY043, SBGD228, And SBGZ011 to read the full article.

Revisiting Our Hands-On Review With The Grand Seiko Spring Drive U.F.A WatchAdvice
Grand Seiko Spring Drive U.F.A Grand Apr 8, 2026

Revisiting Our Hands-On Review With The Grand Seiko Spring Drive U.F.A

Grand Seiko’s Spring Drive U.F.A has an astonishing ±20 seconds per year accuracy. Wrapped in a new slimmer Evolution 9 case and finished with a dial inspired by winter in Shinshu, it’s a masterclass in subtle innovation and timeless elegance. What We Love The Calibre 9RB2 delivers an incredible +/- 20 seconds per year, redefining what is possible from a mainspring-powered mechanical movement The new 37mm case size makes the timepiece highly wearable for a wide range of wrist sizes. The beautifully textured dial captures Grand Seiko’s unique blend of craftsmanship and storytelling. What We Don’t While very comfortable, the standard three-link bracelet feels a little too plain for a release of this calibre. For a groundbreaking caliber, the caseback view feels a little subdued. For such a significant release, the design feels a little too in line with previous Evolution 9 models. Overall Rating: 9.25 / 10 Value for Money: 9.5/10 Wearability: 9.5/10 Design: 9/10 Build Quality: 9/10 This article was originally published as Hands On With The New Grand Seiko Spring Drive U.F.A. Grand Seiko was first established in 1960 as a sister brand to Seiko, created to combat the Swiss watchmakers and their high-end luxury timepieces. While Seiko made affordable everyday timepieces, It was Grand Seiko’s role to create unique, innovative pieces that would cater to the luxury and high-end watchmaking market. Among the many different innovations and stunning dial aesthetics, on...

Cleguer Debuts with Proprietary ‘Innate’ Escapement SJX Watches
Breguet s natural escapement Apr 1, 2026

Cleguer Debuts with Proprietary ‘Innate’ Escapement

In the run-up to Watches & Wonders, a new crop of emergent independents is making its debut. But even within a crowded field, the Cleguer Inspiration One manages to stand out with an ambitious proprietary escapement and clever construction. It’s a promising start for founder Mathieu Cleguer, an engineer who’s had a hand in developing several calibres for well-known independent brands. Initial thoughts The artisanal, highly finished time-only watch is a well-worn trope among independents, but occasionally one breaks from the pattern. The Inspiration One from Cleguer Horology is one such watch. Mathieu Cleguer is an industry veteran who has worked as a movement construction consultant and now produces watches under his own name. The opening salvo in what is planned to be a larger ‘Inspiration’ series designed to explore alternative escapements, the Inspiration One is built around the so-called innate escapement, a fresh twist on Breguet’s natural escapement. The system is Mathieu Cleguer’s own design, and from initial analysis it exhibits a surprising degree of ingenuity and is original in its execution. Discreet signature on the interior bezel. The open design - an off-centre dial with exposed escapement - is a familiar arrangement among independents, but the delicacy of the components gives it a refined quality. The 38.5 mm case is well-proportioned, though the 12 mm height borders on tall. While there’s room to develop a more cohesive design language goi...

Nomos Explores Spring Colors With The Club Campus All Olive And Full Rose Fratello
Nomos Explores Spring Colors Mar 26, 2026

Nomos Explores Spring Colors With The Club Campus All Olive And Full Rose

It has become an annual tradition for Nomos Glashütte to release 36mm and 38.5mm Club Campus models with two new dial colors to celebrate spring. The Club Campus is the perfect youthful series in which to explore new hues. As some of you might know, I love Nomos for leading the way in using uncommon […] Visit Nomos Explores Spring Colors With The Club Campus All Olive And Full Rose to read the full article.

In-Depth: Breguet’s Constant-Force Magnetic Escapement SJX Watches
Breguet s Constant-Force Magnetic Escapement Dec 4, 2025

In-Depth: Breguet’s Constant-Force Magnetic Escapement

Earlier this week, Breguet rounded off its grandiose 250th anniversary with the unexpected launch of the Expérimentale 1 chronometer in Paris. Showcasing modern Breguet’s most impressive innovation to date - a magnetic constant-force escapement - the watch left many scratching their heads simply because the novel invention defies easy explanation. Here we explain the actual functioning of this remarkable invention, and why it represents such a significant step forward in terms of chronometry and escapement technology. The origins of the concept Before turning to the decidedly modern and futuristic Expérimentale 1, we must first take a short trip to the past and consider how the idea of using magnets in mechanical escapements first came to life. For that we must turn to the late 1930s, when Cecil Frank Clifford, Fellow of the British Horological Institute (BHI), started experimenting with oscillators maintained by magnetic rails or escape wheels.  He was granted a British patent in 1954 for a variety of magnetised escape wheels paired with elastic vibrating magnetic blades. The device would operate silently and Clifford envisioned it being used for naval underwater torpedoes, so the lack of ticking would be harder to pick up by sonars.  Iterations of Clifford magnetic escapements. His designs were rudimentary. The principle was that the escape wheel would be braked by a vibrating pair of magnetised blades (in several possible configurations), while simultaneously ...

First Look – The new Steel and Purple Dial Grand Seiko Spring Drive UFA Ice Forest SLGB005 Monochrome
Grand Seiko Spring Drive UFA Ice Sep 25, 2025

First Look – The new Steel and Purple Dial Grand Seiko Spring Drive UFA Ice Forest SLGB005

Earlier this year, at Watches and Wonders Geneva 2025, Grand Seiko unveiled a new and rather important collection, fitted with a brand new movement and carrying a meaningful name, the Spring Drive UFA. Now, if you’re a GS fan, you’ll immediately spot the connection with the VFA models of the past, as the new Ultra […]

Hands-On Review With The New Grand Seiko Spring Drive U.F.A WatchAdvice
Grand Seiko Spring Drive U.F.A Grand Jun 14, 2025

Hands-On Review With The New Grand Seiko Spring Drive U.F.A

Grand Seiko’s Spring Drive U.F.A (SLGB003) sets a new benchmark in mechanical watchmaking with an astonishing ±20 seconds per year accuracy. Wrapped in a new slimmer Evolution 9 case and finished with a dial inspired by winter in Shinshu, it’s a masterclass in subtle innovation and timeless elegance. What We Love The Calibre 9RB2 delivers an incredible +/- 20 seconds per year, redefining what is possible from a mainspring-powered mechanical movement The new 37mm case size makes the timepiece highly wearable for a wide range of wrist sizes. The beautifully textured dial captures Grand Seiko’s unique blend of craftsmanship and storytelling. What We Don’t While very comfortable, the standard three-link bracelet feels a little too plain for a release of this calibre. For a groundbreaking caliber, the caseback view feels a little subdued. For such a significant release, the design feels a little too in line with previous Evolution 9 models. Overall Rating: 9.25 / 10 Value for Money: 9.5/10 Wearability: 9.5/10 Design: 9/10 Build Quality: 9/10 Grand Seiko was first established in 1960 as a sister brand to Seiko, created to combat the Swiss watchmakers and their high-end luxury timepieces. While Seiko made affordable everyday timepieces, It was Grand Seiko’s role to create unique, innovative pieces that would cater to the luxury and high-end watchmaking market. Among the many different innovations and stunning dial aesthetics, one key aspect that truly makes Grand S...

An In-Depth Look At The New Rolex Dynapulse Escapement Fratello
Rolex Dynapulse Escapement Rolex surprised Apr 18, 2025

An In-Depth Look At The New Rolex Dynapulse Escapement

Rolex surprised friend and foe with a new movement at this year’s Watches and Wonders. While that’s always a relatively big deal in our little horological sub-universe, caliber 7135 represents a particularly big milestone. Rolex developed a brand-new escapement dubbed Dynapulse. We felt it was about time we took a closer look at it. Of […] Visit An In-Depth Look At The New Rolex Dynapulse Escapement to read the full article.

Hands On: Grand Seiko Spring Drive UFA SJX Watches
Grand Seiko Spring Drive UFA Take Apr 14, 2025

Hands On: Grand Seiko Spring Drive UFA

Take a moment to think about the characteristics that would make the perfect everyday watch; what would you come up with? The list would probably include things like maximum precision, minimum weight, an agreeable size with good ergonomics, and a design that is at home in both formal and casual environments. It also wouldn’t cost a fortune. That might as well have been the design brief for the new Grand Seiko Evolution 9 Spring Drive Ultra Fine Accuracy (UFA) SLGB001 and SLGB003, which ticks about as many boxes as any single watch can. In fact, just about the worst thing you can say about the UFA is that the design isn’t taking any risks, but that’s the cost of chameleon-like versatility. While the watch is also available in an 80-piece limited edition in platinum (the SLGB001, pictured above), the primary focus of this review will be the more crowd-pleasing titanium version with matching bracelet (the SLGB003), which is a regular production model and priced right. The SLGB003 Initial thoughts Putting it bluntly, the UFA is an absolute spec-sheet monster. If you’re onboard with the idea of a quartz oscillator in an otherwise mechanical watch, there’s very little to nitpick. It’s simply one of the most accurate, wearable, and well-made watches on the market.  In true Grand Seiko style, the UFA is fitted with a nature-inspired dial motif that is modeled on a hillside of frost-covered trees. It’s a fairly abstract representation, which means it will look like d...

Hands On: Grand Seiko Spring Drive Chronograph SBGC275 SJX Watches
Grand Seiko Spring Drive Chronograph SBGC275 Dec 4, 2024

Hands On: Grand Seiko Spring Drive Chronograph SBGC275

Twenty-twenty four marks the 20th anniversary of Grand Seiko’s 9R Spring Drive movement platform, an occasion the brand has chosen to mark with a range of anniversary editions including the Grand Seiko Caliber 9R 20th Anniversary SBGC275. A large, richly detailed watch with a captivating dial, the SBGC275 is robust, interesting, and capable of nearly anything, short of fitting under a short cuff. Initial thoughts At first glance, the SBGC275 looks like just a Spring Drive chronograph with a red dial. But a closer look reveals a highly nuanced colour that changes from red to orange depending on the angle – the result of a proprietary dial coating technique. At 44.5 mm in diameter and nearly 17 mm thick, the SBGC275 is unapologetically big and bold. That said, the watch feels smaller than it is thanks to the use of titanium for the case and bracelet, and the unusually wide 23 mm lug width helps reduce the visual size. This latter dimension may limit the options for aftermarket straps, but since most owners will likely stick with the bracelet, this concern is largely academic. The watch is powered by an upgraded version of the familiar cal. 9R86 Spring Drive chronograph GMT movement, which made its debut in 2007. But eagle-eyed movement geeks will notice the SBGC275 is equipped with the fine-tuned cal. 9R96 first seen in 2017, which was also used in the Nissan GT-R 50th Anniversary edition. In many ways, the SBGC275 captures Grand Seiko’s strengths and weaknesses. The b...

First Look – The Grand Seiko Spring Drive Chronograph GMT Tokyo Lion SBGC275 Monochrome
Grand Seiko Spring Drive Chronograph GMT Apr 12, 2024

First Look – The Grand Seiko Spring Drive Chronograph GMT Tokyo Lion SBGC275

In the previous year, Grand Seiko introduced the Spring Drive Chronograph GMT SBGC253, showcasing a bold case design and distinctive dial texture, thus enhancing the brand’s Sport collection with the permanent addition. This followed the anticipation stirred by limited edition models SBGC230 and SGBC231 in 2019, along with the red gold cased SGBC238, launched in […]

Girard-Perregaux Neo Constant Escapement with Patrick Pruniaux, CEO of Girard-Perregaux Revolution
Girard-Perregaux Neo Constant Escapement Mar 27, 2024

Girard-Perregaux Neo Constant Escapement with Patrick Pruniaux, CEO of Girard-Perregaux

In 2013, Girard-Perregaux debuted the acclaimed Constant Escapement L.M., earning the prestigious ‘Aiguille D’Or’ at GPHG, which is a mechanism that delivered remarkable rate stability irrespective of the available energy. Wei and Girard-Perregaux CEO Patrick Pruniaux explore the Maison’s latest innovation, the Neo Constant Escapement. Enhancing the already remarkable Constant Escapement, it features aesthetic and […]

Sinn Unveils their Spring Novelties, Including a Manually Wound 103 Chronograph and New HYDRO U50 Divers Worn & Wound
Sinn Unveils their Spring Novelties Feb 14, 2024

Sinn Unveils their Spring Novelties, Including a Manually Wound 103 Chronograph and New HYDRO U50 Divers

Sinn dropped their Spring novelties this morning, an event that’s always of keen interest to hardcore watch enthusiasts. Sinn is one of our favorite brands for a whole number of reasons, but I’ve always felt that part of their appeal is in their somewhat elusive, “if you know, you know,” nature. Part of that is the fact that they have a single American distributor, and don’t have the flashiest social media presence. In the US, they still seem very German and are truly a brand for connoisseurs. If you see someone wearing a Sinn, you know that they sought it out, and that it might not have been easy to find.  Sinn’s pattern for novelty releases over the last few years seems to be to release a mix of modern tool watches and vintage throwbacks simultaneously. This year’s vintage throwback is a manually wound chronograph, the 103 St Ty Hd. The 103 is their core chronograph model, the simplest and arguably least fussy, and has been made in a huge number of variants over the years. This new version has a steel case and old-fashioned acrylic crystal, and a panda-style dial layout with red accents.  Fans of the 103 will notice immediately that the 12, 6, 9 (with day/date at 3) layout from previous 103 references is missing, a result of the manually wound Sellita SW 510 M powering the new watch. Here we get a classic three register, no date dial in the same familiar 41mm case. This is Sinn’s first manually wound 103 in 20 years, which should make the release of the...

Introducing – The Grand Seiko Sport Spring Drive GMT SBGE305 honours Caliber 9R 20th Anniversary Monochrome
Grand Seiko Sport Spring Drive GMT Feb 5, 2024

Introducing – The Grand Seiko Sport Spring Drive GMT SBGE305 honours Caliber 9R 20th Anniversary

This year marks the 20th anniversary of Grand Seiko‘s introduction of the 9R movement, featuring its revolutionary Spring Drive technology. The concept, conceived in the 1970s and which took decades to implement, aimed to blend the force of a mainspring with electronic watchmaking technology and surpass the precision of conventional mechanical watches. Now, 9R-family calibres […]

In-Depth: Girard-Perregaux’s True Constant-Force Escapement SJX Watches
Girard-Perregaux s True Constant-Force Escapement Jan 3, 2024

In-Depth: Girard-Perregaux’s True Constant-Force Escapement

Ten years after it arrived on market, Girard-Perregaux revived its most notable modern-day invention with the Neo Constant Escapement. Operating on the same principles as the original, the Neo Constant Escapement (NCE) features an upgraded movement inside a more compact case. A combination of a historical concept originating with Abraham-Louis Breguet and cutting edge horology, the NCE retains the defining invention of the original – a true constant-force escapement. “True” because the constant-force mechanism, comprising a lozenge-shaped silicon spring, is integrated with the pallet lever, which in turn interacts with a “natural” escapement of twin escape wheels. While the key concept has been retained, the rest of the NCE, however, has been improved over the original, with wearability in particular having been enhanced. Initial thoughts The fundamental concept of the NCE is appealing because it successfully combines a significant historical invention, Breguet’s double-wheel escapement, with an innovation that is entirely 21st century, a compliant mechanism in silicon. Both are brought together in an elegant yet ingenious manner. The basis of the movement is Breguet’s échappement naturel, the “natural” escapement with two wheels that has been adopted in the modern day, in a variety of modified forms, by Voutilainen, F.P. Journe, and Charles Frodsham. But the natural escapement here has been enhanced with a constant force mechanism made up of a single pi...

Girard-Perregaux Neo Constant (Force) Escapement: The Evolution of a Revolution Quill & Pad
Girard-Perregaux Neo Constant Force Escapement Oct 16, 2023

Girard-Perregaux Neo Constant (Force) Escapement: The Evolution of a Revolution

While it is remarkable how Girard-Perregaux made the movement, it is even more astonishing how they turned it into such an incredibly good-looking watch. Compared to its predecessor, the Neo Constant Escapement has a very wearable size of 45mm in diameter at a thickness of 14.8mm. It sits nicely on even a smaller wrist thanks to relatively short lugs, while the titanium case keeps the weight down.