Watch brandsWatch wikiWatch videosVariousWatch calendarSaved articles
PopularRolexOmegaPatek PhilippeAudemars PiguetTudorGrand SeikoCartierSeikoIWCTAG HeuerBreitlingJaeger-LeCoultreA. Lange & SohneZenith

Results for ISO 6425 (Diver's Watch Standard)

26,024 articles · 278 videos found · page 38 of 877

What is a Chronometer Watch? A Guide to Ultra-Precise Watches Teddy Baldassarre
Nov 28, 2025

What is a Chronometer Watch? A Guide to Ultra-Precise Watches

When a watch touts on its dial that it is a "Chronometer" or an "Officially Certified Chronometer" or even a "Superlative Chronometer," what exactly does that mean? How does a chronometer watch differ from a watch that does not make that claim? For that matter, a newbie to the timepiece game might ask, what is the difference between a watch with "chronometer" on the dial and a watch with "chronograph" on the dial? In this comprehensive guide, we attempt to answer all of your burning questions about chronometer watches and what sets them apart. [toc-section heading="The Chronometer Throughout History"] Our original, classical definition of a chronometer can be traced back to the golden age of seafaring exploration in the 18th Century, when ships required the use of a highly accurate onboard clock that enabled their navigators to determine longitude in order to avoid the perils of running aground or veering hopelessly off course. The man credited with developing the first of these “marine chronometers” was legendary British watchmaker John Harrison; his invention facilitated the celestial navigation used at the time by navigators at sea to determine their ship’s position in coordination with a sextant. Marine chronometers, which were essentially highly accurate clocks mounted on gimbals inside wooden boxes, were among the first portable timepieces and were instrumental in the global seagoing trade that helped build our modern, interconnected world. Ulysse Nardin, foun...

The Hublot Big Bang Unico Ice Bang Is A Cool Online Exclusive In Ceramic And Tungsten Fratello
Hublot Big Bang Unico Ice Apr 11, 2024

The Hublot Big Bang Unico Ice Bang Is A Cool Online Exclusive In Ceramic And Tungsten

You might be just a few clicks away from the new Hublot Big Bang Unico Ice Bang. It’s an online exclusive only available through Hublot’s e-commerce boutique, and it’s also a limited edition. Just 100 pieces of this black ceramic watch outfitted with a soberly contrasting bezel in tungsten will be made. If you want […] Visit The Hublot Big Bang Unico Ice Bang Is A Cool Online Exclusive In Ceramic And Tungsten to read the full article.

Citizen Unveils their Latest Washi Paper Dials from “The Citizen” Collection Worn & Wound
Citizen Unveils their Latest Washi Mar 20, 2024

Citizen Unveils their Latest Washi Paper Dials from “The Citizen” Collection

As I’ve gotten more and more involved in the watch world over the years, something that’s become a great interest to me is accessible craft in watchmaking. We all know that you can spend five figures (or more) on a watch and get a movement with meticulously hand finished and polished bevels, for instance, but what I’m really drawn to is the brands that are able to do impressive things the old fashioned way at more accessible price points. Think of anOrdain’s enamel dials, for instance, or the handmade silver cases from James Lamb. We frequently look to smaller operations for this kind of work, but large brands are capable of surprising us with unusual craft techniques as well, and we were reminded of that a few weeks with the introduction of a pair of new watches by Citizen using their impressive Washi paper dials.  These watches fall into The Citizen collection from Citizen, one of my favorite names for a collection, even as it drives my editor brain kind of insane. Yes, the watches are called “The Citizen” in the same way the iconic diver made by Rolex is the “Submariner.” I’ll be honest, I don’t know the origin of the use of the definite article in the collection’s name, or anything about the decision to name these watches after the brand itself. Frankly, I don’t want to know, because I like the story I’ve created in my head of Citizen creating a collection that they feel perfectly defines their brand to such a degree that you could call it Th...

The Citizen Promaster Dive 37mm is a no-gimmick joy for smaller tastes Time+Tide
Citizen Promaster Dive 37mm Jul 14, 2023

The Citizen Promaster Dive 37mm is a no-gimmick joy for smaller tastes

The Citizen Promaster Dive 37mm shrinks down the crowd-favourite dive watch. Despite its reduced size, it retains all necessary diving specifications. Three models are available in black, blue or grey with a gold PVD case. Given the sheer amount of dive watches which get released every day, it’s pretty common for them to include some … ContinuedThe post The Citizen Promaster Dive 37mm is a no-gimmick joy for smaller tastes appeared first on Time+Tide Watches.

The Norqain Freedom 60 Ice Blue is a blast of menthol freshness on the wrist Time+Tide
Norqain Freedom 60 Ice Blue Jun 1, 2023

The Norqain Freedom 60 Ice Blue is a blast of menthol freshness on the wrist

The Norqain Freedom 60 Ice Blue Limited Edition brings fresh new colour to the catalogue. Its 100m water-resistant case makes it ready for adventure even as a chronograph. It’s a limited edition of 300 pieces. Norqain are a brand that pride themselves on adventuring and environmentalism, however their best-selling watch is actually one of the … ContinuedThe post The Norqain Freedom 60 Ice Blue is a blast of menthol freshness on the wrist appeared first on Time+Tide Watches.

The Nivada Grenchen Depthmaster ‘No Barracuda’ is the Dive Watch to Wear Incognito Under the Sea Revolution
Nivada Grenchen Depthmaster ‘No Barracuda’ Nov 23, 2022

The Nivada Grenchen Depthmaster ‘No Barracuda’ is the Dive Watch to Wear Incognito Under the Sea

Wei and Jeremiah talk about Nivada Grenchen, a brand that has been recently resurrected by Guillaume Laidet and Remi Chabrat, and some of its incredibly well-made historical models that were field-tested and found to be superb tool watches. The Depthmaster is one of those models and we are honored to collaborate with Nivada to present […]

VIDEO:  Unpacking why the Omega x Swatch BioCeramic MoonSwatch is out of this world Time+Tide
Omega x Swatch BioCeramic MoonSwatch Mar 24, 2022

VIDEO:  Unpacking why the Omega x Swatch BioCeramic MoonSwatch is out of this world

We’re going to call it a space oddity. Albeit it a very welcome one at that. But today’s news that Omega have teamed up with Swatch to create a playful take on the Speedmaster Chronograph in the form of the BioCeramic MoonSwatch has caught the watch world by surprise. In the one corner there’s Omega, … ContinuedThe post VIDEO:  Unpacking why the Omega x Swatch BioCeramic MoonSwatch is out of this world appeared first on Time+Tide Watches.

In-Depth: Philippe Dufour Grande Sonnerie Pocket Watch No. 1 SJX Watches
Feb 7, 2022

In-Depth: Philippe Dufour Grande Sonnerie Pocket Watch No. 1

A quartet representing the entirety of Philippe Dufour’s repertoire went under the hammer last year, with the Grande Sonnerie wristwatch no. 1 setting the record for any Dufour sold publicly when it achieved the equivalent of US$5.2 million including fees. Sold at the same auction, but for substantially less, was the Grande Sonnerie pocket watch no. 1. Despite the relative values, the pocket watch is arguably a more significant timepiece within Mr Dufour’s work. Why? Initial thoughts In today’s wristwatch-centric era, the fact that it is a pocket watch counts against it. That was also the verdict of the market – the pocket watch sold for half as much as the wristwatch in November 2021. But the Grande Sonnerie pocket watch is the ultimate distillation of Philippe Dufour’s philosophy, the ideal synthesis of the inspiration and impetus behind his creations. He has long stated, both publicly and to me in past conversations, that his watches are a reverential homage to the haute horlogerie produced in the Vallée de Joux during its heyday before the Quartz Crisis, the period between the late 19th to the mid 20th centuries. Timepieces of that era, especially those with ebauches made by the valley’s best specialists like Louis-Elisee Piguet and Ami LeCoutre, are the best watches ever made in Switzerland in his view. And the Grande Sonnerie pocket watch can pass for a timepiece from the late 19th century, perhaps even one made by Mr Dufour’s favourite historical w...

First Full Set Of Philippe Dufour Watches At Historical Phillips Geneva Watch Auction: XIV: Grande Et Petite Sonnerie (Wristwatch And Pocket Watch), Duality, And Simplicity Quill & Pad
Oct 31, 2021

First Full Set Of Philippe Dufour Watches At Historical Phillips Geneva Watch Auction: XIV: Grande Et Petite Sonnerie (Wristwatch And Pocket Watch), Duality, And Simplicity

In November 2021 collectors have the chance to see (and possibly buy) all four Philippe Dufour watches in one place, making Phillips' Geneva Watch Auction: XIV what could well be the watch auction of the decade. Joshua Munchow takes a look at each of the four Philippe Dufour models on the block and examines why this is likely to leave its mark on the auction world for years to come.

What is the ultimate two-watch collection? The Time+Tide team have their say… Time+Tide
Aug 25, 2021

What is the ultimate two-watch collection? The Time+Tide team have their say…

Today we defer to the shrewd counsel of Rob Base and DJ E-Z Rock. As the eighties hip- hop duo so wisely put it: “It takes two to make a thing go alright”. And such advice can certainly apply to your watches. If you pick with true mastery then two watches are potentially all you’d … ContinuedThe post What is the ultimate two-watch collection? The Time+Tide team have their say… appeared first on Time+Tide Watches.

VIDEO: How does the new IWC Big Pilot 43 differ from the original Big Pilot 46? Time+Tide
IWC Big Pilot 43 differ Apr 6, 2021

VIDEO: How does the new IWC Big Pilot 43 differ from the original Big Pilot 46?

Back when I was first dipping my toes into the waters of watch enthusiasm, the IWC Big Pilot was one of the first luxury watches that captured my admiration. I had no means to afford it at the time, and I did not have the level of understanding I do today, but its utility and … ContinuedThe post VIDEO: How does the new IWC Big Pilot 43 differ from the original Big Pilot 46? appeared first on Time+Tide Watches.

Auction Watch: Philippe Dufour Simplicity Sells for Record US$662,000 SJX Watches
Oct 9, 2020

Auction Watch: Philippe Dufour Simplicity Sells for Record US$662,000

Sotheby’s fall watch auction in Hong Kong included a diverse selection of independent watchmaking, including two examples of the Philippe Dufour Simplicity, both with silver guilloche dials. The first to go on the block was a 37 mm specimen in white gold with a movement number of 68. It sold to a client represented by Joey Luk of Sotheby’s watch department for HK$3.528m including fees, which is a little over US$455,000. That was substantially above the US$250,000-300,000 range that the Simplicity had generally sold for, setting a new record for the model. The next lot was a 34 mm Simplicity in platinum, numbered “100”. And then the record was broken. After a few minutes of back and forth between an online bidder, as well as phone bidders represented by Ms Luk and John Chan, also of Sotheby’s watch department, Mr Chan’s bidder triumphed with a bid of HK$4.1m. Inclusive of fees, the total was HK$5.136m, or about US$662,000, well over double the most recent high for the Simplicity. Part of the reason behind the price is rarity, not only absolute but also relative to other Simplicities. Platinum is unquestionably the rarest metal version for the watch, and 34 mm examples is are regarded to be fewer than 37 mm. The record price for both watches bode well for the Simplicity 20th Anniversary “00/20” – fresh from maker and offered by Mr Dufour himself – that will be sold at Phillips’ November auction in Geneva.  

Behind the DIN 8330 Standard for Pilot’s Watches Worn & Wound
Sinn lead Oct 3, 2025

Behind the DIN 8330 Standard for Pilot’s Watches

Standards and certifications in watchmaking were primarily developed for chronometry, as well as to reassure the buyer that their watch had been thoroughly tested to a certain level of accuracy. The standards we see most often in the technical specifications are COSC, METAS, and other company or regional chronometry certifications. In modern watchmaking, other key standards like the ISO 6425 dive watch standard, which was developed in the 1990s and followed by watch companies, also come into play. These standards were largely based on various military set standards for watches; however, since each military set their own requirements, there was not one universally followed standard. The International Organization for Standardization (ISO) published specific requirements and testing procedures for a watch to be officially designated a “Diver’s watch”. While there is no ISO standard for pilot’s watches, there are specific requirements set by militaries around the world. One of the most well-known standards is from the WWII German pilot’s watch known as the “Beobachtungsuhren” or “B-Uhren.” B-Uhren pilot’s watch standards are well documented and are still followed by many watch companies to this day. In March 2012, Sinn lead an initiative in collaboration with the Faculty of Aerospace Technology at the Aachen University of Applied Sciences to create TESTAF – Technical Standard for Pilot Watches. TESTAF was developed so that a pilot’s watch meets all mod...

Paulin Introduces the Mara, their First Dive Watch Worn & Wound
Aug 21, 2025

Paulin Introduces the Mara, their First Dive Watch

Earlier this year at the Windup Watch Fair in San Francisco, I heard some buzz that a member of the Paulin team was wearing the watch they’d be debuting at the end of the summer, and that it was a diver. At the time, it seemed almost illogical. Paulin, in my mind, is the definition of a design oriented brand. I own a Paulin Modul, and love the visual impression of the case and dial, and the ingenuity behind the concept of a case built from the ground up to enable the swapping of movements. Dive watches have been made and remade over and over again, and I tend to have the feeling that there’s nothing new under the sun when it comes to tool oriented watches aimed at the enthusiast. Obviously I should have had a little more confidence in Paulin to subvert expectations and create something with their own unique stamp on it.  The Mara, the brand’s new diver, is finally unveiled to the public today, and it still impresses me just as much at launch as it did when I got a short sneak peek in San Francisco. What we have here is a 300 meter diver in stainless steel measuring 39.7mm in diameter. The case is styled as a more robust version of the Modul, and indeed it does have similar lines, particularly in the way the lugs angle inwards toward the center of the case if you view the watch from the front. Everything is just a little more rounded, though, which feels like a small tribute to traditional dive watch design.  The most impressive design cue here in my opinion however...

VIDEO: The Grand Seiko SLGA023 brings unparalleled beauty and accuracy to a dive watch Time+Tide
Grand Seiko SLGA023 brings unparalleled beauty Jul 9, 2023

VIDEO: The Grand Seiko SLGA023 brings unparalleled beauty and accuracy to a dive watch

While it may not be the first brand you think of when it comes to dive watches, Grand Seiko produces some of the most handsome, robust and accurate dive watches on the market. And the latest Grand Seiko Evolution 9 Collection SLGA023 diver is a perfect example. Its faceted hi-intensity titanium evolution 9 case, while … ContinuedThe post VIDEO: The Grand Seiko SLGA023 brings unparalleled beauty and accuracy to a dive watch appeared first on Time+Tide Watches.

Watch Scrolling: Five Instagram Accounts to Follow for Crispy Watch Photography, Wide Ranging Curation and Niche Deep Dives Worn & Wound
Jul 7, 2023

Watch Scrolling: Five Instagram Accounts to Follow for Crispy Watch Photography, Wide Ranging Curation and Niche Deep Dives

The Instagram watch community is an ever growing one. For watch enthusiasts, it has turned from a place where we shared our passion for the hobby by posting the standard wrist shot, to a platform filled with an endless amount of accounts dedicated to high level watch photography, intersections between different interests adjacent to watches and niche accounts that seemingly dive deep into any subject related to horology. It has also become a place where connections are made and friendships are fostered which often lead to a conversation that extends beyond the DMs into real life. In the spirit of beautiful photography, an insatiable appetite to learn new things and meeting new people, Thomas Calara, has chosen five Instagram accounts that embodies that very essence. Great photography as well as a diverse curation are the standard. However, in addition to that, there’s also an array of great storytelling, portraits and historical nuggets sprinkled in. Check out the entire round-up below and the rest of our Watch Scrolling multi-part series here. Header image via: @samsveblenianobsession @samsveblenianobsession Sam’s taste in watches, as well as his photography skills are impeccable and you’d be hard pressed to find someone who knows more about the independent watch space than him. A quick scroll through his feed displays several heavy hitters and even though his collection is independent-focused, his choices for what remains in the watch box still somehow strays away ...

Seiko Announces the SJE093, a Nearly Identical Recreation of the 62MAS Dive Watch Worn & Wound
Seiko Announces Jul 5, 2023

Seiko Announces the SJE093, a Nearly Identical Recreation of the 62MAS Dive Watch

How many times can you go back to the well? If you’re Seiko, and the well is the 62MAS, the answer, apparently, is as many times as you’d like. Or, six. By my rough count, that’s how many re-editions of the historically important Seiko diver we’ve seen since 2017, when they began to really lean into the iconography of their first professional dive watch with the SLA017 along with the SPB051, setting a template for both limited edition, higher priced versions of the 62MAS reedition for collectors, and a more value oriented approach for everyday watch enthusiasts, an approach that was arguably perfected with the SPB143 and its many, many variants. Now, just announced, Seiko has revealed a new re-edition of the 62MAS that might be the closest yet to the aesthetic of the original, with a higher end movement that brings the watch into luxury territory.  The headline here is that the case size of the new SJE093 is the closest approximation yet to the original watch from 1965. It gets the diameter exactly right at 38mm, and, crucially, comes in at just 12.5mm thick. Those are nearly identical measurements to the original 62MAS, and a whole lot more slender than the reissues, and it’s thanks to a new caliber making its debut in this very watch.  The new caliber is the 6L37, which shares an architecture with the 6L35, but has been upgraded to be more durable and resistant to shocks. Seiko says this caliber was made expressly for divers. The “L” series movements are ...

Sinn Goes Full Titanium and Bronze with New T50 Dive Watch Worn & Wound
Sinn Goes Full Titanium Feb 23, 2023

Sinn Goes Full Titanium and Bronze with New T50 Dive Watch

Sinn has released a new midsize diver with some big time specs to kick off their 2023 releases with the new T50. This is a watch that may seem familiar at a glance, as a follow up to the popular U50 released in 2020, but there’s plenty new here to set plenty of distance between the two, the biggest of which are the use of new materials, which include titanium and a new Sinn developed alloy called Goldbronze. This is a proprietary material that boasts some unique features in the service of longevity and functionality in true Sinn fashion. It looks pretty good, too.  The T50 arrives in three main configurations, going from full Goldbronze in a limited edition 125, to a mix of titanium and Goldbronze in the GBDR, and finally a fully titanium example that forgoes the use of Goldbronze altogether. All look to share the same mid case design and proportions of the 41mm U50, which is a very good thing (see our review of the U50 here). This rather svelte and wearable package gets a remarkably stout 500 meter depth rating, and with the T50 adds Sinn’s Ar‑Dehumidifying inside the bottom left lug. The dial and bezel present the biggest departure from the U50 design language, departing from the brutal blocky design of the hands and hour markers in favor of a more approachable look that utilizes bar shaped hour markers and a pair of broadsword hands. The look may be more palatable to those who found the U50 a touch too aggressive, however it comes at the expense of a distinctivel...

INTRODUCING: The Glashütte Original SeaQ – a 39.5mm dive watch with a diamond bezel? Sorry, what? Time+Tide
Glashütte Original SeaQ – Aug 11, 2020

INTRODUCING: The Glashütte Original SeaQ – a 39.5mm dive watch with a diamond bezel? Sorry, what?

Watching Andrew in the Virtual Baselworld 2020 recap I had a deep understanding of the distracted description of the glacial blue degradè dial of the Sixties pieces from Glashütte Original. Today I’m quietly drawn to something that is so far removed from my vintage diver tool-tastes that I am genuinely surprised. Glashütte Original is the independent … ContinuedThe post INTRODUCING: The Glashütte Original SeaQ – a 39.5mm dive watch with a diamond bezel? Sorry, what? appeared first on Time+Tide Watches.

INTRODUCING: A different kind of dive watch – the Oris Regulateur ‘Der Meistertaucher’ Time+Tide
Oris Regulateur ‘Der Meistertaucher’ If May 25, 2017

INTRODUCING: A different kind of dive watch – the Oris Regulateur ‘Der Meistertaucher’

If you dive, or even if you don’t, then you may know that a diver’s regulator is the hub of their equipment – it is what makes breathing underwater possible, after all. We may not be referring to that type of regulator here, but the latest offering from Oris, the updated Regulateur ‘Der Meistertaucher’ (Master … ContinuedThe post INTRODUCING: A different kind of dive watch – the Oris Regulateur ‘Der Meistertaucher’ appeared first on Time+Tide Watches.