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Over 400,000 watches covered by Chrono24 Buyer Protection
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41,272 listings including promoted listings
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Promoted
Rolex Datejust 41
41mm Fluted Wimbledon Dial Jubilee 126334 Unworn 2023
C$20,456
+ C$553 for shipping
Promoted
Rolex Datejust 41
2022+ Datejust 41mm Fluted Bezel 126334 Mint Green Dial Jubilee Bracelet Stainless Steel
C$22,419
+ C$345 for shipping
Promoted
Breitling Chronomat 44 Airborne
30th Annversary
C$6,204
+ C$109 for shipping
Promoted
Rolex GMT-Master II
In Stock 2023 GMT-Master II Sprite 126720VTNR Jubilee Bracelet
C$26,660
Free shipping
Promoted
Rolex Submariner Date
126610LN New Full Set 2023
C$19,551
+ C$207 for shipping
Promoted
Rolex GMT-Master II
Sprite Left handed date
C$25,561
+ C$109 for shipping
Promoted
Rolex GMT-Master II
2023 GMT-Master II Sprite Left Hander Unworn Box Papers 126720VTNR
C$29,661
+ C$173 for shipping
Promoted
Omega Speedmaster Professional Moonwatch
Hesalite NEW 2024 Cal 3861 310.30.42.50.01.001
C$7,869
+ C$145 for shipping
Popular
Omega Speedmaster Professional Moonwatch
310.32.42.50.01.001 Hesalite 42mm
C$7,088
+ C$109 for shipping
Popular
Omega Seamaster Planet Ocean
600M Summer Edition Diver Blue 2023 Bracelet
C$10,080
+ C$166 for shipping
Rolex Submariner Date
Ceramic 41mm 126610LN
C$19,033
+ C$131 for shipping
Promoted
Rolex Datejust 41
Mint Green Baton Dial Steel And White Gold 126334 Box And Papers 2023
C$21,436
+ C$175 for shipping
Promoted
Rolex Datejust 41
In Stock 2023 Datejust 41 Black Index Dial 126334 Oyster Bracelet
C$17,265
Free shipping
Promoted
Rolex Datejust 41
Wimbledon Jubilee Unworn Condition 126334
C$19,275
+ C$207 for shipping
Promoted
Rolex Datejust 41
Mint Green dial NEW/UNWORN
C$21,761
+ C$109 for shipping
Promoted
Rolex Submariner (No Date)
Ref. 124060 / Box & Papers / Like New
C$17,341
+ C$109 for shipping
Promoted
Rolex Datejust 41
2023 Datejust 41 Blue Baton Dial 126334 Unworn Jubilee Bracelet Box And Papers
C$20,911
+ C$173 for shipping
Popular
Omega Speedmaster Professional Moonwatch
'23 New Speedmaster Hesi Moonwatch Co-Axial Master Chronometer w/New Style Clasp
C$7,736
+ C$345 for shipping
Popular
Omega Speedmaster Professional Moonwatch
310.30.42.50.01.001
C$6,500
Excl. shipping
Private Seller
Rolex Submariner (No Date)
41mm Black Dial 124060
C$17,064
+ C$131 for shipping
Promoted
Rolex Datejust 41
Grey Slate Wimbledon Green Roman Dial Oyster Bracelet 126334
C$20,242
+ C$137 for shipping
Promoted
Rolex GMT-Master II
2023 GMT-Master II Sprite Unworn Box And Papers 126720VTNR
C$27,561
+ C$175 for shipping
Promoted
Rolex Datejust 41
NEW 2023 Mint Green Stick Dial Fluted Bezel - Stainless Steel Jubilee Bracelet
C$22,101
Free shipping
Promoted
Rolex Submariner (No Date)
41mm No Date
C$17,616
+ C$109 for shipping
Promoted
Rolex GMT-Master II
NEW 2024 GMT-Master II "Sprite" Jubilee 126720 MOSTLY STICKERED
C$26,806
+ C$386 for shipping
Popular
Omega Seamaster Aqua Terra
2518.5000 cal.1538
C$2,650
Excl. shipping
Private Seller
Popular
Omega Speedmaster
Two Counters Co-Axial Titanium Chronograph Blue Ceramic
C$8,843
+ C$166 for shipping
Rolex GMT-Master II
126720VTNR "Sprite" Oyster Stainless Steel 2023
C$25,272
+ C$173 for shipping
Rolex Sea-Dweller
43mm Black Dial 126600
C$18,446
+ C$131 for shipping
Promoted
Rolex Submariner (No Date)
Black Dial No Date 124060
C$18,791
+ C$137 for shipping

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Rolex Day-Date 36
White Gold Top Conditions
C$24,733
Free shipping
Rolex GMT-Master II
NEW 2023 GMT-Master II "Sprite" 40mm 126720VTNR Oyster
C$24,899
+ C$276 for shipping
Promoted
Rolex GMT-Master II
sprite left handed Jubilee 2024
C$26,390
+ C$109 for shipping
Promoted
Omega De Ville Prestige
NEW Co-Axial 39.5mm 424.13.40.20.02.002
C$3,848
+ C$145 for shipping
Promoted
Rolex Datejust 41
NEW 2023 Blue Index Dial Fluted Bezel Oyster Bracelet
C$19,337
Free shipping
Promoted
Breitling
Premier B01 Chronograph
C$5,734
Excl. shipping
Private Seller
Promoted
Rolex GMT-Master II
126720VTNR NEW 2023 NOVEMBER Sprite Oyster Steel 40 mm
C$25,541
+ C$276 for shipping
Rolex Sea-Dweller
43mm Black Dial 126600
C$18,446
+ C$131 for shipping
Promoted
Rolex Datejust 41
Grey Slate Wimbledon Green Roman Dial Oyster Bracelet 126334
C$20,146
+ C$137 for shipping
Rolex GMT-Master II
126720VTNR GMT Master II on Oyster
C$26,771
+ C$109 for shipping
Rolex GMT-Master II
126720VTNR "Sprite" NEW 2023
C$24,802
+ C$138 for shipping
Promoted
Rolex Datejust 41
Blue Azzuro dial Fluted bezel NEW/UNWORN
C$18,239
+ C$109 for shipping
Popular
Omega Seamaster Diver 300 M
2023 Seamaster Diver 300M Co-Axial Master Chronometer 43.5MM Watch 210.92.44.20.01.003
C$10,461
+ C$137 for shipping
Promoted
Rolex Datejust 41
NEW 2023 Datejust 41 AZZURRO BLUE ROMAN OYSTER 126334
C$19,206
+ C$386 for shipping
Popular
Omega Seamaster Aqua Terra
2503.50.00
C$4,007
Excl. shipping
Private Seller
Popular
Omega Seamaster 300
Master Retro 41mm 233.30.41.21.01.001 Bracelet
C$5,387
+ C$220 for shipping
Tudor Black Bay Chrono
41mm White 79360N
C$6,211
+ C$131 for shipping
Promoted
Rolex Datejust 41
Grey Slate Wimbledon Green Roman Dial Oyster Bracelet 126334
C$20,035
+ C$137 for shipping
Promoted
Rolex GMT-Master II
126711CHNR NEW 2024 FEBRUARY Root Beer 18k Rose Gold Steel 40 mm
C$29,562
+ C$276 for shipping
Popular
Omega Seamaster Aqua Terra
150m
C$5,527
+ C$207 for shipping
Promoted
Rolex Datejust 41
NEW 2023 Wimbledon Green Roman Dial Fluted Bezel - Stainless Oyster Bracelet
C$20,166
Free shipping
Popular
Omega Speedmaster Professional Moonwatch
310.30.42.50.01.001
C$6,990
Excl. shipping
Private Seller
Promoted
Omega Seamaster Diver 300 M
210.30.42.20.03.001
C$5,499
Excl. shipping
Private Seller
Rolex Submariner (No Date)
NEW 2023 Submariner 41mm 124060 Stainless Steel Black Dial
C$17,823
+ C$276 for shipping
Longines Spirit
L3.812.4.93.6
C$3,040
Excl. shipping
Private Seller
Promoted
Omega Seamaster Diver 300 M
210.30.42.20.01.001
C$6,494
Excl. shipping
Private Seller
Rolex Sea-Dweller
43mm Black Dial 126600
C$18,646
+ C$131 for shipping
Promoted
Rolex Submariner (No Date)
Black Dial No Date 124060
C$18,584
+ C$137 for shipping
Popular
Omega Seamaster Planet Ocean
215.33.40.20.01.001 COMPLETE SET
C$6,204
+ C$109 for shipping
Rolex Datejust 41
126334 Grey Dial Fluted Bezel Jubilee Stainless Steel
C$19,481
+ C$173 for shipping
Rolex Datejust 41
41mm Grey Diamond Jubilee 126334-0006 Mint 2020
C$19,275
+ C$269 for shipping
Rolex Datejust 41
In Stock 2024 Datejust 41 Wimbledon Dial 126334 Jubilee Bracelet
C$22,653
Free shipping
Rolex Submariner (No Date)
41mm 124060 Oystersteel Black Dial Unworn/Complete/2023
C$17,232
+ C$137 for shipping

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.