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Results for The Longitude Problem

42,505 articles · 171 videos found · page 921 of 1423

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The Longitude Problem

The 200-year navigation crisis solved by John Harrison\'s H4 marine chronometer (1759); the lineage to modern COSC and Master Chronometer.

In Depth: Louis Cottier’s Legacy SJX Watches
4 days ago

In Depth: Louis Cottier’s Legacy

Sometime around 1949, in a workshop above a stationer’s shop in Carouge, Louis Cottier built a worldtime watch out of a piece of cardboard. Movado had asked him to fit their famous Ermeto — a small purse-watch that was wound by opening and closing its case — with a device to read the hour in any country. What Cottier delivered was a piece of card: two columns listing the 12 antipodal city pairs, with a sliding paper scale of hours. Open the case, slide the scale, read New York against Rome. It was ingenious to a fault. Movado’s verdict was blunt, and fair: it ignored the running of the watch entirely and “…could just as well be made on an address-book or a diary,” they wrote on February 4, 1950. The brand concluded that “Nobody would want to carry such a piece.” The 1949 World Time cardboard maquette proposed to Movado. Image – SJX composite/Musée d’art et d’histoire de Genève The cardboard maquette survives, in an archive of some 260 items — letters, patents, notebooks, photographs, a school exercise book, a golf-scoring mechanism — that comprise the most complete record we have of the man the watch world calls the father of the worldtimer. But the story revealed by this evidence is more nuanced than Cottier’s reputation suggests. The legend, briefly The received Louis Cottier is easy to summarise, because everyone summarises him the same way. He was born in Carouge in 1894, and trained in Geneva. After losing his job in the aftermath of th...

SJX Podcast: Independent Watchmaking Retrospective SJX Watches
Franck Muller 4 days ago

SJX Podcast: Independent Watchmaking Retrospective

Ahead of Geneva Watch Days — which will feature 71 brands, many of them independent — episode 49 of the SJX Podcast looks back at how independent watchmaking became the phenomenon it is today. SJX and Brandon trace its evolution from 1970s pioneers like George Daniels and François-Paul Journe through the arrival of Daniel Roth, Philippe Dufour, and Franck Muller. The conversation also examines the avant-garde boom of the 2000s, the renewed emphasis on traditional finishing, and the role of digital photography and social media in transforming a solitary pursuit into a global collecting community. Listen now on Apple Podcasts, Spotify, and YouTube.  

Sunday Morning Showdown: Longines Hydroconquest Vs. Tudor Black Bay “Monochrome” Fratello
Longines Hydroconquest Vs Tudor Black 5 days ago

Sunday Morning Showdown: Longines Hydroconquest Vs. Tudor Black Bay “Monochrome”

Good morning and welcome to another Sunday Morning Showdown. Grab yourself a nice cup of coffee and take a seat for a battle between two very popular divers. Last week, it was a fight between two Swatch group divers; this week, we pit Longines against Tudor. Both the updated Hydroconquest and the Black Bay “Monochrome” […] Visit Sunday Morning Showdown: Longines Hydroconquest Vs. Tudor Black Bay “Monochrome” to read the full article.

Watches, Stories, & Gear: Ideal Watch Size Survey, Matador’s Reinvention, and Myspace’s Return Worn & Wound
5 days ago

Watches, Stories, & Gear: Ideal Watch Size Survey, Matador’s Reinvention, and Myspace’s Return

“Watches, Stories, and Gear” is a roundup of our favorite content, watch or otherwise, from around the internet. Here, we support other creators, explore interesting content that inspires us, and put a spotlight on causes we believe in. Oh, and any gear we happen to be digging on this week. We love gear. Mark Cho’s Ideal Watch Size Survey is Back Co-founder of The Armoury and permanent resident on my own inspiration board, Mark Cho has once again put out his Ideal Watch Size Survey to the masses. For those unfamiliar, Cho first ran the survey from 2018 to 2021, asking participants about their actual wrist size, how they perceived their wrist size, and what they considered the ideal size for a watch. From this data, Cho and others, including ourselves, were able to glean information about industry trends, but also how those trends seem to affect the way we look at our own bodies. In fact, with nearly 1,000 respondents in the original survey, a significant percentage of people viewed their wrists as smaller than average, while Cho’s findings also pointed toward a growing interest in watches around the 37 to 39mm range (keep in mind, this was a time of Big Watch Supremacy in the marketplace). As with any data set, one can’t always say, “X equals Y,” but there is an interesting correlation (or is it causation? I always forget from my Statistics class) between what the industry makes, what collectors buy, and what we eventually convince ourselves we can wear. With...

Seiko Celebrates Honda’s Quirky Bike with 5 Sports Motocompo SJX Watches
Seiko Celebrates Honda’s Quirky Bike 6 days ago

Seiko Celebrates Honda’s Quirky Bike with 5 Sports Motocompo

Compact, affordable Japanese icons collide in the Seiko 5 Sports Motocompo Limited Edition ref. HDB010, a collaboration with Honda that celebrates a collectable and compact 1980s motorbike. It recreates the Motocompo’s Daisy Yellow paint, retro typography, and even its packaging. And at 36.4 mm in diameter, it too can fit in the back of the Honda Jazz. Initial thoughts The Honda Motocompo was an adorable folding scooter briefly offered as an option on the Honda Jazz/City during the early 1980s. When folded up, it was small enough to squeeze into the back of a subcompact car, or even an Acura NSX. Its retro styling is back in fashion, and low production numbers — due to weak sales — make it quite collectable today. Honda offered the Motocompo in three colors: Caribbean Red, Shetland White, and the Daisy Yellow you see here. Image – Honda Motor Company I find the colour choice odd, as to me Honda means red — from the NSX to the brand’s motorcycles. “Honda Red” is the brand’s corporate colour, after all. If this colourway makes me think of anything, it’s Kill Bill: Volume 1. The case back crystal, however, is classic Honda red, concealing the industrially finished workhorse cal. 4R36. Colour aside, the Honda wordmark is appealingly subtle, and the stylised “automatic” text at six, which echoes the original Motocompo branding, turns an otherwise unnecessary label into a defining element of the design. Bluntly speaking, Seiko typography fell off a cliff ...

Introducing: Unimatic UT1-PD Hodinkee
Unimatic UT1-PD What We Know 6 days ago

Introducing: Unimatic UT1-PD

What We Know It's been two years since Unimatic announced their "Toolwatch" collection, and it's possible that you may have forgotten about it. Like all Unimatics, the watches have a strict design language that can make releases blend together. Small tweaks, like today's release of the UT1-PD (Prodiver, in their terms), might look like something you thought existed before, but this is very much a new watch. So what makes the Toolwatch line, and what makes this limited release of 250 pieces different? The UT1-PD has a sandblasted stainless steel case with a 40mm diameter (41.5mm including bezel overhang), 13.6mm thickness (13.3mm without the crystal), and a 49mm lug-to-lug. This is designed as a strict dive watch, meeting all your needs, with a unidirectional 120-click rotating bezel, 300m water resistance, a screw-down crown, and a reliable Seiko VH31A quartz movement. Yes, we love mechanical watches, but quartz does the trick for many needs.  The matte dial has white printing with round, triangular, and rectangular hour markers (unlike the previous version, which had Arabic hour markers), and the watch features Super-LumiNova C1 on the hour markers, hour and minute hands, and bezel pip. There are also drilled lug holes, and the watch comes with a black TPU two-piece strap. But the core of Unimatic's Toolwatch line is that the watches meet the U.S. Department of Defense MIL-STD-810H specs, which outline a range of environmental tests to evaluate the durability, ruggedness...

Video - An Almost Impossible Choice… Frank’s Long Journey to Finding his Favourite Omega Speedmaster Monochrome
Omega Speedmaster Some from day-1 6 days ago

Video - An Almost Impossible Choice… Frank’s Long Journey to Finding his Favourite Omega Speedmaster

Some, from day-1, know what their favourite version of the all-time iconic Omega Speedmaster is. Whether it is the classic Moonwatch, a modern automatic version, a retro-inspired straight lugs or even a specific vintage model, their search was a short journey. It was not the case for me. I have always loved and respected the […]

Bring a Loupe: A Patek Phillipe 5000R, A Seiko 7018-8000, Jaeger-LeCoultre Master Calendar Moonphase Meteorite, And Much More Hodinkee
Jaeger-LeCoultre Master Calendar Moonphase Meteorite 6 days ago

Bring a Loupe: A Patek Phillipe 5000R, A Seiko 7018-8000, Jaeger-LeCoultre Master Calendar Moonphase Meteorite, And Much More

Welcome to the dregs and dog days of summer, and happy Friday again. I was emailing someone in Germany who informed me she'd be out of contact until her company reopened—they shut down for the first three weeks of August—and I desperately wish that idea had taken hold worldwide. Especially for those of us north of the equator, these weeks feel like they'd be best spent lounging, taking a sort of seasonal siesta, reading books (the new Tana French is phenomenal) and catching up on shows and movies (Widow's Bay, good lord). Scorekeeping last week's picks: the Wittnauer 235T ends tomorrow, the 8th, and is at $800 at the time of writing, the Blancpain sold for €20,000, and the Eberhard and Cleto Munari are both still available. Strays Photo courtesy of Tropical Watch. My apologies, Baller, for not including this Harwood automatic from the 1920s in last week's listing. While it's a tidy, tiny 30mm, Harwoods are worth paying attention to because they're some of the first automatic watches ever (Leroy beat them, apparently, as being the very first), and you'll note the thing's crownless as well, because the unmarked bezel's not a timing bezel, it's how the time was set. Congrats to whoever snagged it. If you're also more than a little ensorcelled by asymmetric watches, and this Cartier ticks all sorts of boxes (other than all the diamonds). At some point I'll find a Smiths worth giving full coverage to, but until then, this Smiths Imperial—part of a three-watch lot—is w...

Twelve on Time - Urwerk’s Felix Baumgartner and his Personal Relationship with Time and Watches Monochrome
Urwerk s Felix Baumgartner 6 days ago

Twelve on Time - Urwerk’s Felix Baumgartner and his Personal Relationship with Time and Watches

Twelve on Time is a conversation series that invites leading personalities from the watch industry to step beyond their work and speak more personally about their relationship with time, creativity, and craft. Through a set of twelve questions, the column aims to lift the veil on both the individual and their perspective on watchmaking, revealing […]

Hands On: Breguet Classique Tourbillon Sidéral SJX Watches
Breguet Classique Tourbillon Sidéral Aug 7, 2026

Hands On: Breguet Classique Tourbillon Sidéral

The Tourbillon Sidéral debuted last year to mark Breguet’s 250th anniversary. This year, the brand is celebrating the 225th anniversary of its founder’s best-known achievement: the tourbillon. For this occasion, Breguet released a quartet of new references, among them the Classique Tourbillon Sidéral ref. 7255PT, a 50-piece limited edition in platinum, once again featuring an in-house aventurine enamel dial. Initial thoughts Despite being the brand’s first-ever flying tourbillon, the Tourbillon Sidéral feels somewhat familiar. That’s because its cal. 187M1 is derived from the brand’s original wristwatch tourbillon movement, the cal. 558, released in 1989. That explains the familiar off-centre dial arrangement and full-plate architecture visible through the case back. Within this lineage, the Tourbillon Sidéral can be considered the spiritual heir and technical successor to the Classique Tourbillon Messidor 5335 released 2007, a watch that seemed to suspend its tourbillon in mid-air. In fact, this mystery tourbillon was driven by a sapphire crystal drive wheel, and its upper pivot was supported by a sapphire crystal bridge. The Tourbillon Sidéral elevates this concept to its natural conclusion, dispensing with the upper support bridge entirely, resulting in a true flying tourbillon. Unfortunately, the two-armed tourbillon cage itself spans almost the entire width of the opening, and at times resembles an upper support bridge, at least until the eye registers ...

Join Worn & Wound and Citizen Watch America for an Enthusiast Night in Salt Lake Worn & Wound
Accutron Frédérique Constant Aug 6, 2026

Join Worn & Wound and Citizen Watch America for an Enthusiast Night in Salt Lake

If you’ve ever wished you could spend an evening trying on watches that normally live behind glass—or are nearly impossible to find in the first place—we’ve got good news. On Thursday, August 27, Worn & Wound is teaming up with Citizen Watch America and our friends at Morgan Jewelers for a private enthusiast event in the Salt Lake Valley, and you’re invited. Private Event Thursday, August 27, 2026 6:30–8:30 PM MT Morgan Jewelers – Center of Brilliance 6102 S State St. Murray, UT 84107 This isn’t your average watch event. We’re bringing along a curated collection of standout pieces from Citizen, Bulova, Accutron, Frédérique Constant, and Alpina—including watches that are difficult to track down, rarely seen in person, or simply deserve far more wrist time than they usually get. Everything will be out and in the metal, ready for you to pick up, strap on, obsess about, and, if one steals your heart… it’s ready for purchase. A few of the amazing highlights include: Citizen Eco-Drive Photon – Reference BJ6560-53W This limited-edition celebrates the 50th anniversary of Eco-Drive technology has a silver-tone Super Titanium with a Duratect titanium carbide finish, with a worldwide limit of only 5,000 pieces. This will be a first-time opportunity to see this watch in-person as we’re receiving it early, specifically for this event. The Citizen Hand-dyed Indigo Washi Paper Dial Limited Edition – Reference AQ4090-08A This premium, high-accuracy Eco-Driv...

A Touch Of Watch Heaven: Patek Philippe 6105G-001 Celestial Sunrise And Sunset Fratello
Patek Philippe 6105G-001 Celestial Sunrise Aug 6, 2026

A Touch Of Watch Heaven: Patek Philippe 6105G-001 Celestial Sunrise And Sunset

An oversized white-gold case inspired by space modules, paired with a seamlessly integrated X-patterned composite strap and a dial depicting the sky as seen from Geneva on a sapphire-crystal dial. The Patek Philippe 6105G-001 Celestial Sunrise and Sunset is a contemporary take on the eternal celestial theme. Inside the oversized case beats the caliber 240 […] Visit A Touch Of Watch Heaven: Patek Philippe 6105G-001 Celestial Sunrise And Sunset to read the full article.

Seiko Introduces A Purple Rotocall And Five Other New Watches For Its 145th Anniversary Fratello
Seiko Introduces Aug 6, 2026

Seiko Introduces A Purple Rotocall And Five Other New Watches For Its 145th Anniversary

I know it’s become a bit Seiko-heavy here these days, and I have the feeling we haven’t seen the end of it yet. This year marks Seiko’s 145th anniversary, and they’re making sure you are aware. This morning, we received another “drop” straight from Japan. Six new Seiko watches from different collections, all featuring a […] Visit Seiko Introduces A Purple Rotocall And Five Other New Watches For Its 145th Anniversary to read the full article.