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🌍 Style · Travel · 1955 Pan Am

GMT & World Time

Multi-time-zone watches for the long-haul era. From the 1955 Pan Am commission that produced the Rolex GMT-Master to modern world-time complications with all 24 reference cities on the dial.

1955 GMT-Master launch
Pan Am Original commission
24h bezel Standard layout
World time Cottier 1937
2,059 Articles
The Vaer G2 Meridian Is an Affordable Take on the Iconic Pepsi GMT

Photo: Two Broke Watch Snobs · Yesterday

A GMT watch shows two time zones simultaneously: home time on the standard 12-hour dial, plus a second 24-hour hand reading off a 24-hour graduated bezel. The genre opens with the Rolex GMT-Master (1955, ref. 6542), commissioned by Pan American Airways for trans-oceanic pilots. The world-time complication, distinct from GMT, shows all 24 zones at once via a rotating 24-hour disc with reference cities; it was patented by Louis Cottier in 1937 and licensed to Patek Philippe and Vacheron Constantin.

The GMT-Master is one of the few sports-watch icons commissioned by an airline rather than a government. Pan American Airways approached Rolex in 1953 for a watch that could display Greenwich Mean Time alongside local time, supporting the new trans-Atlantic Boeing 707 routes. The 1955 ref. 6542 launch carried the now-canonical red-and-blue "Pepsi" bezel; the 1959 ref. 1675 became the volume reference and remained in production with cosmetic updates until 1980.

The modern GMT category divides into caller GMTs (the 24-hour hand jumps in 1-hour increments via the crown, leaving local time alone) and traveler GMTs (the local hour hand jumps independently of the 24-hour reference, the format Rolex uses on modern Cal. 3285 references). The Grand Seiko Spring Drive GMT, Tudor Black Bay GMT, and Omega Aqua Terra GMT are the volume modern alternatives.

Louis Cottier's 1937 world-time patent uses a fixed 12-hour dial, an inner 24-hour ring, and a city ring graduated for all 24 reference time zones. The mechanism is more elegant than GMT but has half the readability. Patek Philippe ref. 1415 (1939) and Vacheron Constantin Cottier-licensed pieces are the canonical heritage references; modern Patek 5230 and the Vacheron Overseas World Time are the volume modern equivalents.

Iconic gmt & world-time watches

Rolex GMT-Master II 1955 Pan Am commission. Pepsi / Batman / Sprite ceramic bezels. Vacheron Constantin Overseas World Time Cottier-style 37-zone world time on the integrated-bracelet sports case. Tudor Black Bay GMT Pepsi GMT in the heritage Black Bay case. Manufacture <a href="/watch-calibers/tudor-mt5402/">MT5652</a> movement. Grand Seiko Spring Drive GMT Spring Drive 9R66 quartz-precision GMT. SBGE family. Breitling Navitimer GMT Slide-rule chronograph + GMT. The pilot-chronograph cross.

Related brands

Rolex Tudor Omega Grand Seiko Patek Philippe Vacheron Constantin Jaeger-LeCoultre IWC Breitling Oris

From the wiki

Latest GMT & World-Time Watches news

A Big Update for the Christopher Ward Sealander Worn & Wound
5 days ago

A Big Update for the Christopher Ward Sealander

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Introducing: Christopher Ward Overhauls The Sealander Line With Design Refinements And Upgrades Hodinkee
6 days ago

Introducing: Christopher Ward Overhauls The Sealander Line With Design Refinements And Upgrades

What We Know The Sealander sits at the core of Christopher Ward's lineup, serving as its everyday, approachable, price-conscious, do-it-all Swiss-made watch. For those considering a Christopher Ward for the first time and looking for a sport watch with the most bang for the buck, the Sealander GMT or Automatic three-hander has been a logical go-to. It's also been a major seller, with the 39mm white dial GMT often taking the honors as the top-volume model for the U.K.-based company. So when Christopher Ward embarks on a major overhaul and redesign of the Sealander collection, it's a significant moment.  Unveiled today, and on sale beginning tomorrow, the new models bring a slimmer case and upgraded movement for the Automatic, refinements to the case and dial design for both models, a new 42mm size for the GMT, and upgraded, more user-friendly bracelets with tool-free adjustment and link removal. Starting with the Sealander GMT, the brushed case has been redesigned, giving a more refined, thinner profile and sporty finish, and is available in 36mm, 39mm, and, for the first time, 42mm. The new case offers sharper lugs with distinctly faceted, polished edges. The upgraded, refined finishing further emphasizes the crown guards that remain on the GMT case, adding to the overall rugged appearance.  The brushed 24-hour fixed bezel with black lacquer-filled numbers is now less angled with a flatter profile to improve legibility while giving the watch more presence across the thre...

Introducing: The Patek Philippe 5322G Brings A More Modern-Sized And Styled Chiming Alarm Function To The Catalog (Live Pics) Hodinkee
Apr 28, 2026

Introducing: The Patek Philippe 5322G Brings A More Modern-Sized And Styled Chiming Alarm Function To The Catalog (Live Pics)

What We Know Unveiled as part of a slew of new releases for Watches and Wonders 2026, the Patek Philippe 5322G offers a chiming 24-hour alarm complication in a modern case and design, with a new movement and a slightly smaller size than the discontinued model it replaces. The watch is housed in a white gold 41mm Calatrava case that's 12.22mm thick and features hollowed-out lugs, the brand's signature 'Clous de Paris' or "hobnail" guilloché pattern on the case middle, and a single pusher at 2 o'clock. The alarm is programmed through the pusher, and it can be set via the crown in the second position, which the brand says works "intuitively."  With a water resistance of 30 meters, Patek says the new 5322G is the only water-resistant chiming watch in the current collection. The new model replaces the Ref. 5520 Pilot Alarm Travel Time, which debuted in 2019 and was inspired by an historical aviator watch in the Patek museum in Geneva. Photo courtesy Patek Philippe. The model continues Patek's modern Calatrava style with a textured, lacquered dial in green or blue. The applied Arabic numerals and white-gold, syringe-style hands are both filled with luminescent material, adding to the contemporary feel. A hand display date sits at 6 o'clock, while the double-window aperture of the alarm function sits above the handset at 12 o'clock. Powering the 5322G is the new self-winding AL 30-660 S C caliber that chimes the alarm with a single hammer striking a classic gong around the case...

Revisiting The Raymond Weil Freelancer Complete Calendar Hands-On Review WatchAdvice
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Revisiting The Raymond Weil Freelancer Complete Calendar Hands-On Review

As Raymond Weil comes out of their shell, so do more incredible timepieces. But have they hit a new peak with the Freelancer Complete Calendar? Let’s find out! What We Love: An elegant and versatile design Quality-of-life upgrades to a classic complication Excellent value proposition with few competitors What We Don’t: Movement finishing somewhat lacklustre The calendar is hard to see from a distance Do we need the lume? Overall Rating: 9/10 Value for Money: 9/10 Wearability: 9/10 Design: 9/10 Build Quality: 9/10 This article was originally published as Is The New Raymond Weil Freelancer Complete Calendar Their Best Yet?  There’s a rapid surge happening in watchmaking right now. No, I’m not talking about the newly imposed 39% U.S. tariffs on Swiss watches (though that’s a story in itself), but rather the quiet re-emergence of the middle market. As household names climb further upmarket, a new wave of brands are pushing harder than ever, flexing their creative and horological muscles to prove what they’re truly capable of. Christopher Ward is one; Frederique Constant and Maurice Lacroix are others. But perhaps the most impressive contender in this power shift is none other than Raymond Weil. Nearly 50 years young, the family-owned independent has been quietly racking up achievements and accolades. Their breakout moment came with the GPHG-winning Millésime collection, followed by ambitious world timers and flyback chronographs — complications that once f...

Sunday Morning Showdown: Nomos Club Sport Neomatik Worldtimer Vs. Frederique Constant Classic Worldtimer Manufacture Fratello
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Sunday Morning Showdown: Nomos Club Sport Neomatik Worldtimer Vs. Frederique Constant Classic Worldtimer Manufacture

It’s Sunday morning, which means it’s time for a nice cup of coffee and an early morning watch battle. On top of that, this is the first one after Watches and Wonders 2026 officially ended. This week has predominantly been one of reflecting on the new introductions and, for the Fratello team members who were […] Visit Sunday Morning Showdown: Nomos Club Sport Neomatik Worldtimer Vs. Frederique Constant Classic Worldtimer Manufacture to read the full article.

Watches & Wonders: Nomos Introduces the Club Sport neomatik Worldtimer in a Classic Colorway Worn & Wound
Apr 24, 2026

Watches & Wonders: Nomos Introduces the Club Sport neomatik Worldtimer in a Classic Colorway

A year removed from last year’s Watches & Wonders, it’s clear that Nomos had the accessible watch of the show, and maybe of the year, with the Club Sport neomatik Worldtimer. Introduced initially in rhodium plated silver and blue dial executions, along with a handful of limited edition colorways that turned out to be incredibly highly sought after, the new Nomos Worldtimer became a bit of a phenomenon among a certain type of watch enthusiast. Over the course of the last year, we’ve seen Nomos return to the Worldtimer a few times with new limited editions, always appearing to sell out quickly. Given the appetite for this watch, it’s no wonder that Nomos would go back to the well a year later to introduce yet another variant. This one, though, immediately feels like the colorway that should have existed all along.  The new Club Sport neomatik Worldtimer in a white silver plated dial is a permanent addition to the collection. And it should be – this is basically the colorway that defined Nomos through their early years, and the period of time where they really grew as an enthusiast driven brand across the larger Watch Internet. This simple silvery white is, for most people, the dial color they imagine in their head when they close their eyes and think of a Nomos. It’s simple, minimal, and very much core to the Nomos brand identity. While they’ve certainly become known in recent years as being more freely experimental with color (to great effect – I own a mult...

Auctions: Phillips Bringing Three Mega Pateks to Its Spring Sales Hodinkee
Apr 23, 2026

Auctions: Phillips Bringing Three Mega Pateks to Its Spring Sales

We'll have further auction coverage in the coming weeks, but it's worth giving Phillips a bit more attention, as it continues to lead in year-over-year sales. The auction house sold a record total of over $290 million in watches last year and has had five years in a row with over $200 million in sales. The market has shifted (I'd argue at least twice) in the past few years, but despite the growing F.P. Journe, independent, and pocket watch (yes, pocket watch) markets, the top lots for Phillips continue to be Patek Philippe. At each of their spring auctions, Phillips is selling an important Patek to headline the sale, and each is the kind of watch that could be the pinnacle of the world's top collections. Normal caveat here: I haven't seen these watches in person yet, and anyone considering bidding should make sure to check any watch in person if at all possible. A Patek Philippe ref. 2523 Two-Crown World Time With Cloissoné Enamel South America Dial First, we have the star of Geneva, to be sold on May 9: the Patek Philippe ref. 2523 two-crown world time with cloisonné enamel map of South America, from 1953. Aside from rare variants of 2499s or 1518s (and a few repeaters), these two-crown watches, with their incredible, angular lugs and giant open canvas at the center of the dial, have become the holiest of Holy Grails for many collectors. They are rare enough to be hunted and coveted, but there are also enough out there to be studied, understood, and codified. Too rare o...

The Iconic Seiko 1968 Diver Gets A New Automatic GMT Movement Two Broke Watch Snobs
Apr 23, 2026

The Iconic Seiko 1968 Diver Gets A New Automatic GMT Movement

Seiko has been revisiting its 1968 Diver's platform for years now, and the Prospex Heritage family keeps getting more interesting with each wave of releases. The latest additions are the HBC001 and HBC002, two new references that bring a mechanical GMT complication to the lineage for the first time. Both watches reference the 1968 original while expanding what the modern Prospex Heritage line can do. Availability is set for May this year. The post The Iconic Seiko 1968 Diver Gets A New Automatic GMT Movement appeared first on Two Broke Watch Snobs.

Watches & Wonders: Bremont Goes Upmarket With the Supernova Tourbillon and a Vintage-Styled Chronograph With a Historic Movement Worn & Wound
Apr 22, 2026

Watches & Wonders: Bremont Goes Upmarket With the Supernova Tourbillon and a Vintage-Styled Chronograph With a Historic Movement

For Watches and Wonders 2026, Bremont is aiming for the stars: not only with the Supernova Chronograph, a new space-oriented lineup that will actually go to the moon, but also showcasing what the British brand can do with a pair of upmarket, collectible chronographs. One of them features an in-house tourbillon movement, while the other resurrects an vaunted historic movement in an elegant, limited-edition, and vintage-inspired design.  The Supernova Chronograph, also making its debut in Geneva at Watches & Wonders, is the first of a new line for Bremont, a steel sports watch with an integrated bracelet and a generously-sized 41mm case. But Bremont is also using its architecture to debut the brand’s second tourbillon movement, following 2024’s Terra Nova Dual Time Tourbillon. This time around, the Supernova Tourbillon exhibits a skeleton design with all of its movement bridges and tourbillon cage displayed around a black ceramic bezel and a sapphire crystal, with red jewels as the Supernova’s only exhibition of color.  Dramatically, the markers, bridges, Dauphine hands, and the tourbillon’s three markers glow with a bright blue Super-LumiNova, a nod to the space theme that the Supernova is aiming for.  If the Supernova Tourbillon is aimed at the future, Bremont’s other release has a distinctly vintage feel-starting from its movement. Bremont is resurrecting the Valjoux 23 two-register chronograph movement into its new Altitude Chronograph Pulsometer: a restor...

Watches & Wonders: Frederique Constant Offers a Smart Update to their Classic Worldtimer Manufacture Worn & Wound
Apr 22, 2026

Watches & Wonders: Frederique Constant Offers a Smart Update to their Classic Worldtimer Manufacture

Frederique Constant has built themselves a nice little niche delivering complicated watches at relatively affordable and impressive price points. While their perpetual calendar is probably the most impressive in terms of straight up value (somehow it still comes in under $10,000, even after years of rising prices throughout the sector) it’s the Worldtimer Manufacture that is likely their true signature. It’s a genuinely accessible complication that, at the time it was introduced, was novel in a watch well under the five figure mark.  Over the years there have been a number of variants introduced, but little has changed as far as the actual execution of the watch. That changes with the introduction of a trio of new worldtimers, all sporting the new manufacture movement, designated FC-719. The new caliber allows two nagging issues to be addressed: case size and dial clutter.  If you’re familiar with Frederique Constant’s Worldtimer Manufacture, you’ve likely already noticed that the large subdial at 6:00 displaying the date has been completely removed. A no-date worldtimer is a big change, but there’s no denying that the dial is significantly cleaner without the date. It allows the dial motif, a representation of a globe, common enough on these watches, to fully stand on its own. Dial options for this refreshed worldtimer include a limited diamond set version, a version on a strap with iridescent blue ocean waters, and a bracelet version with a more matte blue ...

Hands On: Patek Philippe Calatrava 24-Hour Alarm 5322G SJX Watches
Apr 22, 2026

Hands On: Patek Philippe Calatrava 24-Hour Alarm 5322G

Patek Philippe’s mastery of complications is evident at all levels. The brand’s ability to elevate even simple complications is on full display in the Calatrava 24-Hour Alarm 5322G, a smaller and more focused take on the alarm watch than the discontinued spider-like Alarm Travel Time 5520P from 2019. This puts the most refined alarm movement on the market in the popular hobnail-flanked Calatrava case, capped with punchy green and blue fumé dials. Initial thoughts Launched in 2019, Patek Philippe’s Alarm Travel Time ref. 5520 was a polarising design from the start, with the appearance of four crowns - three of which were actually screw-locked pushers - when combined with the four lugs giving the watch an octopoid appearance. Looks aside, it was Patek Philippe’s first wristwatch with an alarm, and introduced a refined new calibre. This year Patek Philippe builds on that foundation without the travel time functionality and streamlined looks, eliminating the appearance of an awkward double crown setting system. There is no actual change to the base movement’s functionality - save the deletion of the travel time module. Perhaps a decade ago this bright green dial, or even the blue, would feel out of place in a high-grade watch, but today it fits right into the brand’s extremely colourful and contemporary catalogue. Even so, the dial design is sure to be polarising, especially the conflict between the 12 o’clock marker and alarm indicator, which the latter s...

Hands On: Patek Philippe Calatrava 24-Hour Alarm Ref. 5322G SJX Watches
Apr 22, 2026

Hands On: Patek Philippe Calatrava 24-Hour Alarm Ref. 5322G

Patek Philippe’s mastery of complications is evident at all levels. The brand’s ability to elevate even simple complications is on full display in the Calatrava 24-Hour Alarm 5322G, a smaller and more focused take on the alarm watch than the discontinued spider-like Alarm Travel Time 5520P from 2019. This puts the most refined alarm movement on the market in the popular hobnail-flanked Calatrava case, capped with punchy green and blue fumé dials. Initial thoughts Launched in 2019, Patek Philippe’s Alarm Travel Time ref. 5520 was a polarising design from the start, with the appearance of four crowns - three of which were actually screw-locked pushers - when combined with the four lugs giving the watch an octopoid appearance. Looks aside, it was Patek Philippe’s first wristwatch with an alarm, and introduced a refined new calibre. This year Patek Philippe builds on that foundation without the travel time functionality and streamlined looks, eliminating the appearance of an awkward double crown setting system. There is no actual change to the base movement’s functionality - save the deletion of the travel time module. Perhaps a decade ago this bright green dial, or even the blue, would feel out of place in a high-grade watch, but today it fits right into the brand’s extremely colourful and contemporary catalogue. Even so, the dial design is sure to be polarising, especially the conflict between the 12 o’clock marker and alarm indicator, which the latter s...

First Look – The New Radiant White Version of the Nomos Club Sport Neomatik Worldtimer Monochrome
Apr 21, 2026

First Look – The New Radiant White Version of the Nomos Club Sport Neomatik Worldtimer

The Nomos Club Sport Neomatik Worldtimer was enthusiastically received at Watches & Wonders last year. Praised for its traveller-friendly complication, resilient yet slim case construction, fun, fresh colours and in-house movement, another winning factor was its accessible price. For 2026, Nomos tones down the colour scheme of its Worldtimer and proposes a serene silvery-white version […]

Auctions: Previewing The Monaco Legend Spring 2026 Auction Hodinkee
Apr 20, 2026

Auctions: Previewing The Monaco Legend Spring 2026 Auction

The spring auction season is sneaking up on us quickly. Things start early with Sotheby's Hong Kong auction (with its boatload of Cartier), which slightly edges Monaco Legend Group out of the gate, as their auction starts one day earlier. But on April 25 and 26, MLG will open its spring auction, which promises to be one of the more interesting and eclectic vintage-focused auctions of the season. That's not to say it's all vintage, of course. The auction starts out with a Bamford-modified blackout GMT (that the Parmegiani family behind the auction house seems to have an affinity for), an RM35-02 Nadal, a Journe Répétition Souveraine, and more Patek 5004s than you can shake a stick at, keeping things spicy. Lot 109 – F.P. Journe Répétition Souveraine – €400,000 to €800,000. There are 288 lots, and while the top lots sometimes feel a bit obvious to call out (mostly because everyone likely peers longingly at these watches and wishes they could bid), it's incredibly important to examine what is driving the top end of the market. And if you weren't paying close enough attention, you'd potentially miss the top lot. While it might look like a Rolex Daytona, like the ref. 116509 with a Tahitian mother-of-pearl dial and different indices, this is a whole different ballgame. Lot 78 of the auction is one of the "FAB 4" Daytonas, four unique platinum Zenith Daytonas, each executed with a hardstone dial (one with turquoise, one with lapis lazuli, two mother-of-pearl) made at...