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Omega Seamaster Aqua Terra 220.10.34.20.63.001 Very good Steel 34mm Automatic
Top
Omega Seamaster Aqua Terra 150M Co-Axial Stahl 220.10.34.20.63...
4 800
+ €49 for shipping
Sold by Chrono24
DE
Omega Seamaster Aqua Terra 231.10.42.21.02.003 Very good Steel 41.5mm Automatic
Top
Omega Seamaster Aqua Terra 150M Automatik Stahl 231.10.42.21.0...
3 500
+ €49 for shipping
Sold by Chrono24
DE
Rolex Yacht-Master II 116689 Very good White gold 44mm Automatic
Top
Rolex Yachtmaster II (Full Set, Box, Papiere, 2014)
46 787
+ €49 for shipping
Professional dealer
4,70 (1 153)
DE
Rolex Milgauss 116400GV Unworn Steel 40mm Automatic
Top
Rolex Oyster Perpetual Milgauss 116400GV Teilverklebt
13 550
+ €89 for shipping
Professional dealer
4,87 (479)
DE
Omega Seamaster Planet Ocean Chronograph 232.30.46.51.01.003 Very good Steel 45.5mm Automatic
Top
Omega Seamaster Planet Ocean Co-Axial Chronograph 232.30.46.51...
5 250
+ €59 for shipping
Sold by Chrono24
DE
Omega Globemaster 130.30.39.21.02.001 Very good Steel 39mm Automatic Finland, Oulu
Omega Constellation Globemaster Like new 2020
5 250
+ €39 for shipping
Professional dealer
4,99 (39)
FI
Omega Seamaster 300 233.30.41.21.01.001 Good Steel 41mm Automatic
Top
Omega 【Polished】Seamaster 300 Master Co-axial Automatic Black...
3 187
+ €43 for shipping
Professional dealer
4,91 (230)
JP
Omega Constellation 2648 SC Very good Yellow gold 35mm Automatic
Top
Omega Constellation Pie Pan 18K Gold Gelbgold Hammer Automatik...
4 490
+ €100 for shipping
Professional dealer
4,90 (539)
DE
Breitling Superocean Heritage II 46 AB2020121B1S1 New Steel 46mm Automatic
Top
Breitling SUPEROCEAN HERITAGE B20 AUTOMATIC 46 AB2020121B1S1
4 020
Free shipping
Professional dealer
4,95 (195)
JP
Omega Seamaster Diver 300 M 210.30.42.20.01.001 Unworn Steel 42mm Automatic
Top
Omega Seamaster Diver 300M Master Chronometer 42mm Black Dial,...
4 879
Free shipping
Professional dealer
4,97 (785)
IT
Omega Seamaster Aqua Terra 220.12.41.21.06.001 New Steel 41mm Automatic
Top
Omega Seamaster Aqua Terra 41 mm Grey
5 158
+ €60 for shipping
Professional dealer
4,92 (340)
DE
Vacheron Constantin Royal Eagle 42008/000G Very good White gold 35.5mm
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Vacheron Constantin Royal Eagle White Gold
13 780
Free shipping
Professional dealer
4,93 (165)
IT
Frederique Constant FC-303V4NH2B New Steel 41mm Automatic
Top
Frederique Constant Cosc Highlife Automatic COSC 41mm White...
1 443
Free shipping
Professional dealer
4,94 (1 293)
IT
Breitling Montbrillant A48330 Very good Steel 43mm Manual winding
Top
Breitling Navitimer Montbrillant Edition Chronograph Handaufzu...
3 620
+ €49 for shipping
Sold by Chrono24
DE
Tudor Black Bay Fifty-Eight M79010SG-0001 Very good Silver 39mm Automatic Finland, Oulu
Tudor Black Bay Fifty-Eight 925 Like new 2021 Full set
3 830
+ €39 for shipping
Professional dealer
4,99 (39)
FI
Breitling Superocean Heritage Chronograph A2337036/BB81 Unworn Steel 44mm Automatic Finland, HELSINKI
Breitling Superocean Heritage Chronograph GREEN 44mm Unworn...
5 990
+ €10 for shipping
Professional dealer
4,78 (197)
FI
Rolex Daytona 116518LN Unworn Yellow gold 40mm Automatic
Top
Rolex Cosmograph Daytona - Full-Stickers
45 500
+ €300 for shipping
Professional dealer
4,77 (6 504)
DE
Breitling A007G-1KBA New Steel 42mm Automatic
Top
Breitling PREMIER B01 CHRONOGRAPH42 See-through back AB0118221...
6 838
Free shipping
Professional dealer
4,95 (195)
JP
Baume & Mercier Clifton M0A10592 New Steel 40mm Automatic
Top
Baume & Mercier Clifton Baumatic 40 mm Automatic, COSC...
2 429
Free shipping
Professional dealer
4,97 (785)
IT
Breitling Chronomat Colt A17313101G1X1 New Steel 41mm Automatic
Top
Breitling Chronomat Colt 41 Automatic
2 496
+ €60 for shipping
Professional dealer
4,92 (340)
DE
Rolex Yacht-Master II 116688 Very good Yellow gold 44mm Automatic
Top
Rolex Yachtmaster II, Full Set (Rolex Service 2022)
47 829
+ €49 for shipping
Professional dealer
4,70 (1 153)
DE
Breitling Chronomat Evolution A1335653 Very good Steel 44mm Automatic
Top
Breitling Chronomat Evolution Diamonds
7 950
+ €50 for shipping
Professional dealer
4,84 (1 603)
NL
Omega Seamaster Planet Ocean 522.32.40.20.01.003 Very good Steel 39.5mm Automatic
Top
Omega Official Olympic Timekeeper Automatik Stahl 522.32.40.20...
3 750
+ €49 for shipping
Sold by Chrono24
DE
Rolex Datejust 41 126334 Very good Steel 41mm Automatic Finland, Oulu
Rolex Datejust 41 Azzurro Blue Full set
15 450
+ €39 for shipping
Professional dealer
4,99 (39)
FI
Omega Speedmaster Racing 326.30.40.50.04.001 Very good Steel 40mm Automatic
Top
Omega Speedmaster Racing 326.30.40.50.04.001 / BOX & PAPERS...
3 787
Free shipping
Professional dealer
4,90 (304)
NL
Omega Speedmaster Professional Moonwatch 31192445101003 Very good Ceramic 44.2mm Automatic
Omega Speedmaster Dark Side of The Moon Ceramic 31192445101003...
8 346
+ €89 for shipping
Sold by Chrono24
UK
Breitling Avenger A32395101C1X1 New Steel 45mm Automatic
Top
Breitling AVENGER AUTOMATIC GMT 45 A32395101C1X1
3 513
Free shipping
Professional dealer
4,95 (195)
JP
Ulysse Nardin Maxi Marine Diver 266-37LE-3B Good Yellow gold 43mm Automatic Finland, Helsinki
Ulysse Nardin Maxi Marine Diver
10 850
Excl. shipping
Private Seller
FI
Breitling Superocean Heritage Chronograph AB0162121B1A1 New Steel 44mm Automatic
Top
Breitling Superocean Heritage Chronograph B01
6 731
+ €60 for shipping
Professional dealer
4,92 (340)
DE
Omega Speedmaster Professional Moonwatch 310.30.42.50.01.001 Very good Steel 42mm Manual winding
Top
Omega Speedmaster Moonwatch Co-Axial Chronometer Top condition...
5 450
+ €100 for shipping
Professional dealer
4,83 (133)
ES

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Omega Seamaster Planet Ocean 232.32.42.21.01.005 Very good Steel 42mm Automatic Finland, Jyväskylä
Omega Seamaster Planet Ocean
4 250
+ €20 for shipping
Professional dealer
4,93 (50)
FI
Breitling Avenger Seawolf M17330 Very good Steel 45mm Automatic
Top
Breitling Avenger Seawolf Limitiert Automatik Stahl Herrenuhr...
3 270
+ €49 for shipping
Sold by Chrono24
DE
Chopard Grand Prix de Monaco Historique 168570-3002 New Titanium 44.5mm Automatic
Top
Chopard Grand Prix de Monaco Historique
5 004
+ €46 for shipping
Professional dealer
4,78 (51)
CH
Breitling Avenger II A1338111 Very good Steel 43mm Automatic
Top
Breitling Avenger A1338111 / BOX & PAPERS / 2016 / Black Dial...
3 889
Free shipping
Professional dealer
4,90 (304)
NL
Rolex Daytona 116509 Good White gold 40mm Automatic
Rolex Daytona Beach White Gold 116509 - Just Serviced 24...
131 166
+ €89 for shipping
Sold by Chrono24
UK
Breitling Navitimer A17395F41G1A1 New Steel 35mm Automatic
Top
Breitling NAVITIMER AUTOMATIC35 A17395F41G1A1
4 056
Free shipping
Professional dealer
4,95 (195)
JP
Ulysse Nardin Marine Chronometer Manufacture 118-122-210 Fair Rose gold 45mm Automatic Finland, Turku
Ulysse Nardin Marine Chronometer Manufacture 45MM 18-Carat...
12 900
Excl. shipping
Private Seller
FI
Breitling Transocean Chronograph Unitime RB0510U4/BB63 New Rose gold 46mm Automatic
Top
Breitling Transocean Chronograph Unitime 750 Rosegold
17 709
+ €60 for shipping
Professional dealer
4,92 (340)
DE
Rolex Sea-Dweller 126600 Unworn Steel 43mm Automatic
Top
Rolex Sea-Dweller 43 mm 126600 50 th Anniversary ceramic black...
16 275
+ €97 for shipping
Professional dealer
US
Breitling Superocean 42 A1736402/BA29 Good Steel Automatic Finland, Jyväskylä
Breitling Superocean 42
2 400
+ €20 for shipping
Professional dealer
4,93 (50)
FI
Omega Seamaster Aqua Terra 231.20.42.21.06.001 Very good Gold/Steel 41.5mm Automatic
Top
Omega Seamaster Aqua Terra Stahl / Roségold Ref. 231.20.42.21....
6 150
+ €59 for shipping
Sold by Chrono24
DE
Omega Seamaster Aqua Terra 231.10.42.21.02.003 coaxial 2019 Chronometer skeleton Very good Steel 41.5mm Automatic
Top
Omega Seamaster Aqua Terra (serviced) Master Co-axial Omega...
3 950
Free shipping
Professional dealer
4,78 (108)
NL
Omega Speedmaster Racing 326.30.40.50.02.001 Very good Steel 40mm Automatic
Top
Omega Speedmaster Racing 326.30.40.50.02.001 / BOX & PAPERS...
3 787
Free shipping
Professional dealer
4,90 (304)
NL
Breitling Navitimer R23322 Very good Rose gold 42mm Automatic
Breitling Navitimer Limited Edition of 500 Pieces Rose Gold...
11 924
+ €89 for shipping
Sold by Chrono24
UK
Breitling B-1 A117B-1NP New Steel 42mm Automatic
Top
Breitling PREMIER CHRONOGRAPH42 A13315351B1A1
5 360
Free shipping
Professional dealer
4,95 (195)
JP
Very good Manual winding Finland, Vantaa
Daini Seikosha Marine Chronometer
10 190
Excl. shipping
Private Seller
FI
TAG Heuer Autavia WBE5190.FC8268 New Bronze 42mm Automatic
Top
TAG Heuer Autavia Calibre 5 Chronometer Bronze
2 803
+ €60 for shipping
Professional dealer
4,92 (340)
DE
Montblanc 1858 MB125583 New Bronze 42mm Automatic
Top
Montblanc 1858 Monopusher Chronograph (Limited Edition)
5 636
Free shipping
Professional dealer
4,93 (589)
LV
TAG Heuer Grand Carrera WAV5112.BA0901 Very good Steel Automatic
Top
TAG Heuer Grand Carrera GMT
2 450
+ €38 for shipping
Professional dealer
4,85 (30)
TR
Breitling Bentley Mark VI P26362 Very good Steel 42mm Automatic
Top
Breitling Bentley Mark VI Chronograph Stahl / Platin Automatik...
4 750
+ €49 for shipping
Sold by Chrono24
DE
Cartier Roadster Very good Steel 47mm Automatic
Top
Cartier Roadster Xl W62020x6 Silver Dial Stainless Steel Fully...
19 412
+ €97 for shipping
Professional dealer
4,79 (509)
US
Rolex Submariner (No Date) 124060 New Steel 41mm Automatic
Top
Rolex Submariner No Date March 2022 New & Unworn 124060
15 138
+ €298 for shipping
Professional dealer
4,94 (32)
UK
Rolex Datejust 41 126334 Very good Gold/Steel 41mm Automatic
Rolex Datejust 41 Mother of Pearl Diamond Dot White Gold &...
17 885
+ €89 for shipping
Sold by Chrono24
UK
Breitling A007C-1NP New Steel 42mm Automatic
Top
Breitling PREMIER B01 CHRONOGRAPH42 See-through back A007C-1NP
7 098
Free shipping
Professional dealer
4,95 (195)
JP
Ulysse Nardin Marine Chronograph 516-22-3/62 Very good Rose gold 40mm Automatic Finland, Tampere
Ulysse Nardin Marine Annual Chronograph
8 990
Excl. shipping
Private Seller
FI
TAG Heuer Autavia WBE5116.EB0173 New Steel 42mm Automatic
Top
TAG Heuer Autavia Automatik Blue
2 500
+ €60 for shipping
Professional dealer
4,92 (340)
DE
Rolex GMT-Master II 126720VTNR New Steel Automatic
Rolex GMT-Master II With A Green And Black Bezel "SPRITE"...
36 275
+ €97 for shipping
Professional dealer
4,91 (114)
US
Rolex Datejust 41 126334 Good Gold/Steel 41mm Automatic
Top
Rolex Datejust Stainless Steel Blue Dial - ref 126334
12 878
+ €59 for shipping
Professional dealer
4,67 (6)
UK
TAG Heuer Autavia CBE511C.FC8280 Very good Ceramic 42mm Automatic
Top
TAG Heuer Autavia Chronometer Flyback Automatik Stahl CBE511C....
5 450
+ €59 for shipping
Sold by Chrono24
DE
Cartier Roadster W62020X6 Very good Steel 47mm Automatic
Top
Cartier Roadster XL Chronograph Stainless Steel Diamond Watch...
11 861
+ €97 for shipping
Professional dealer
4,79 (509)
US
Rolex Datejust 41 126334 Unworn White gold 41mm Automatic
Rolex Datejust 41 126334, 2021/09, dark rhodium, Eu, ungetrage...
15 190
+ €80 for shipping
Professional dealer
4,86 (99)
DE
Rolex Daytona 116519 Very good White gold 40mm Automatic
Rolex Daytona Sodalite White Gold 116519 - Just Serviced 24...
77 507
+ €89 for shipping
Sold by Chrono24
UK
Breitling A13315351C1KBA New Steel 42mm Automatic
Top
Breitling PREMIER CHRONOGRAPH42 A13315351C1KBA
4 592
Free shipping
Professional dealer
4,95 (195)
JP
Rolex Submariner (No Date) 124060 Very good Steel 41mm Automatic Finland, Helsinki
Rolex Submariner
14 400
Excl. shipping
Private Seller
FI
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Chronometer - Certified Precision

"Chronometer" may sound like a fancy name for a normal watch - after all, it just comes from the Greek words for "time" and "measure" - but chronometers are really something quite special. Chronometers are watches, yes, but watches that have been tried and tested and certified to meet exacting precision standards. The COSC in Switzerland determines which watches may actually call themselves "chronometers".


The Oceanic Origins of Chronometers

Though the Swiss set the standard, the English coined the word. In the quest to calculate the longitude, the Englishman Jeremy Thacker, a clockmaker of extraordinary skill, created a series of increasingly accurate clocks, well beyond what had had previously been achieved. The clocks were intended to be used aboard ships and had to keep absolutely accurate time in order to allow for calculating longitude precisely, and thus fixing the position of the ship in the vast ocean. The last of Thacker's chronometers was actually more like a very large pocket watch.

Other clockmakers - and increasingly watchmakers - copied from and improved upon Thacker's final chronometer, producing watches of greater and greater precision. The original standards for accuracy were actually far more exacting than those currently maintained by the COSC in Switzerland, so very few watches were certified as chronometers and thus very few were actually produced and sold. The original chronometer requirements for mechanical watches are no longer necessary, since digital watches can already exceed them, but chronometers are still manufactured and sold (and resold) today as examples of extremely fine precision engineering. The use of jewels and precious metals in watches owes its origins to chronometers - these materials were used to make the mechanical movements as precise as possible.


Officially Certified Chronometers

Chronometers are no longer rare. More than a million Officially Certified Chronometer certificates are issued each year. Those watches that pass the most rigorous of the COSG's tests are rewarded with a special serial number and, indeed, the right to call themselves "chronometers" at all. Chronometers must meet several requirements: they must display the seconds; they must be highly precise; they must demonstrate that precision over the course of several consecutive days of testing; they must perform precisely in different positions and at different temperatures.


Chronometers in Everyday Use

This may sound extreme, but such reliability was crucial for individuals and groups that had to rely on the precision of portable mechanical timekeepers in the past. Pilots watches, for instance, needed to perform as chronometers (and those that did not had to be hackable). The famous B-Uhren, commissioned by the German Luftwaffe and manufactured by several companies, were chronometer-certified pilots watches - or chronometers that were used as pilots watches, depending on your perspective. Interestingly, despite the many years between Thacker's invention and the production of the B-Uhren, chronometers were still tightly bound to use in navigation.

First at sea, then in the air. And, still today, at sea again - or at least under it. Some diving watches, like the Rolex submariner, are also certified chronometers. Divers must be able to reliably track how long they've been under and how much time they have to surface.

Though their accuracy may have been eclipsed by digital watches, chronometers are still useful today.