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Rolex Datejust 41 126334 Unworn Steel 41mm Automatic
TOP
Rolex Datejust 41mm Fluted White Stick Dial Oyster 126334 Unworn
C$17,180
+ C$523 for shipping
Professional dealer
4.98 (657)
US
Rolex Datejust 41 126334 Unworn Steel 41mm Automatic
TOP
Rolex Datejust 41mm Fluted Silver Stick Jubilee 126334 Unworn
C$18,226
+ C$523 for shipping
Professional dealer
4.98 (657)
US
Rolex Datejust 36 16234 Very good Steel 36mm Automatic
TOP
Rolex Mens Rolex Datejust 16234 Factory Diamond Dial 18k White...
C$9,540
+ C$103 for shipping
Professional dealer
4.87 (118)
US
Rolex Submariner Date 126610LN Unworn Steel 41mm Automatic
TOP
Rolex Submariner Date 41mm 126610LN Unworn 2021
C$21,885
+ C$523 for shipping
Professional dealer
4.98 (657)
US
Omega Seamaster Diver 300 M 212.30.36.20.03.001 Good Steel 36.25mm Automatic Canada, NORTH YORK
TOP
Omega Seamaster Automatic Ceramic Bezel 36mm
C$3,739
+ C$99 for shipping
Professional dealer
4.96 (9)
CA
Omega Seamaster Aqua Terra 220.23.41.21.02.001 Unworn Gold/Steel 41mm Automatic Canada, Abbotsford
Omega Seamaster Aqua Terra
C$9,000
Free shipping
Professional dealer
4.88 (60)
CA
Rolex Datejust 41 126334 Very good Steel 41mm Automatic
TOP
Rolex Datejust 41 Rhodium Diamond Fluted Oyster Box/Papers/Car...
C$17,643
Free shipping
Professional dealer
4.97 (194)
US
Rolex Sea-Dweller 126600 Very good Steel 43mm Automatic
Rolex Sea-Dweller "Single Red" Herrenuhr Stahl Oyster Perpetua...
C$21,353
+ C$236 for shipping
Sold by Chrono24
DE
Rolex Datejust 36 Rolex Datejust 1601 Good Gold/Steel 36mm Automatic Canada, Alberta
Rolex Datejust 1601 Gold/SS Vintage Oyster Automatic
C$6,850
+ C$30 for shipping
Professional dealer
4.95 (34)
CA
Rolex Submariner (No Date) 114060-APP New Steel 40mm Automatic
TOP
Rolex Submariner Artisans De Geneve Andrea Pirlo 40mm New...
C$95,182
+ C$148 for shipping
Professional dealer
4.89 (270)
RO
Tudor Black Bay Fifty-Eight M79010SG-0002 Very good Silver 39mm Automatic
TOP
Tudor Black Bay Fifty-Eight 925 M79010SG Silver Complete
C$6,731
+ C$103 for shipping
Professional dealer
4.97 (40)
US
Rolex Datejust 41 126334 Very good Steel 41mm Automatic
TOP
Rolex Datejust 41 Stainless Steel and White Gold Silver Index...
C$16,728
Free shipping
Professional dealer
4.94 (266)
US
Rolex Datejust 41 126334 New Steel 41mm Automatic
TOP
Rolex Datejust 41 Wimbledon Slate Dial Fluted Bezel Jubilee...
C$22,139
+ C$129 for shipping
Professional dealer
4.94 (125)
US
Rolex Submariner Date 1680 Good Steel 40mm Automatic
TOP
Rolex : 'Red' Submariner Date 1680 : 1680 : :
C$40,869
+ C$131 for shipping
Professional dealer
4.92 (540)
US
Omega Speedmaster Professional Moonwatch 311.93.44.51.99.002 Unworn Ceramic Automatic Canada, Abbotsford
Omega Grey Side Of The Moon Speedmaster Moonwatch
C$13,500
Free shipping
Professional dealer
4.88 (60)
CA
Omega Seamaster Aqua Terra 220.10.43.22.03.001 Very good Steel 43mm Automatic
TOP
Omega Seamaster Aqua Terra 150M Blue GMT Worldtimer Box/Papers...
C$10,454
Free shipping
Professional dealer
4.97 (194)
US
Omega Speedmaster Racing 326.30.40.50.03.001 Very good Steel 40mm Automatic
Omega Speedmaster Racing Chronograph Co-Axial Herrenuhr Ref....
C$5,091
+ C$133 for shipping
Sold by Chrono24
DE
Rolex Lady-Datejust 69178 Very good Yellow gold 26mm Automatic Canada, Alberta
Rolex Lady-Datejust 69178 Diamond Dial 18k Yellow Gold
C$11,180
+ C$30 for shipping
Professional dealer
4.95 (34)
CA
Rolex Oyster Perpetual 41 124300 Very good Steel 41mm Automatic
TOP
Rolex Oyster Perpetual 41mm Tiffany Turquoise Dial Ref: 124300
C$18,446
+ C$148 for shipping
Professional dealer
4.89 (270)
RO
Rolex Submariner Date 126610LV New Steel 41mm Automatic
Rolex Submariner Date 126610LV NEW Stickers Sept 2021 Steel 41 mm
C$27,642
+ C$157 for shipping
Professional dealer
4.82 (116)
US
Rolex Datejust 41 126334 Very good Steel 41mm Automatic
Rolex Datejust - Silver Stick Dial - 126334 Jubilee Bracelet
C$15,669
+ C$163 for shipping
Professional dealer
4.98 (106)
US
Rolex Day-Date 40 228235-0025 New Rose gold 40mm Automatic
Rolex Rose Gold Day Date 40 Olive Roman Dial 228235
C$98,009
Free shipping
Professional dealer
US
Bremont ALT1-C Classic ALT1-C/SI Very good Steel 43mm Automatic Canada, Bradford
TOP
Bremont ALT1-C/SI
C$4,500
Excl. shipping
Private Seller
CA
Rolex Sky-Dweller 326934 Unworn Steel 42mm Automatic
TOP
Rolex : Sky-Dweller : 326934 : Stainless Steel : blue dial
C$40,712
+ C$131 for shipping
Professional dealer
4.92 (540)
US
Tudor Black Bay Fifty-Eight M79010SG-0002 New Silver 39mm Automatic
TOP
Tudor Black Bay Fifty-Eight 925 Silver Fabric Box/Papers/Card...
C$6,795
Free shipping
Professional dealer
4.97 (194)
US
Breitling Superocean 42 A17364 Very good Steel 42mm Automatic
Breitling Superocean 42 Chronometer Automatik Edelstahl...
C$3,911
+ C$133 for shipping
Sold by Chrono24
DE
Rolex Submariner Date 126610LN Very good Steel 41mm Automatic
Rolex Submariner Date 41mm 126610LN 2020
C$20,910
+ C$129 for shipping
Professional dealer
4.98 (354)
US
Rolex GMT-Master II 16710 Unworn Steel 40mm Automatic
TOP
Rolex GMT-Master II 2001 Boxes Papers Pepsi Blue Red Bezel...
C$25,448
+ C$129 for shipping
Professional dealer
4.94 (125)
US
Rolex Milgauss 116400 Very good Steel 40mm Automatic
Rolex Milgauss 116400 White 2009 Box Papers Steel 40 mm
C$15,030
+ C$157 for shipping
Professional dealer
4.82 (116)
US
Rolex Submariner (No Date) 124060 Very good Steel 41mm Automatic
Rolex Submariner 124060 - Full Set
C$19,080
+ C$163 for shipping
Professional dealer
4.98 (106)
US

Chrono24 Buyer Protection

The Safest Path to Your Dream Watch

More information

Rolex Datejust 41 126334 New Steel 41mm Automatic
Rolex 126334 Datejust 41mm White Gold Diamond Black Dial...
C$19,278
Free shipping
Professional dealer
US
Omega Seamaster Aqua Terra 220.20.34.20.55.001 Unworn Gold/Steel 34mm Automatic Canada, Amos
TOP
Omega Seamaster Aqua Terra
C$8,500
Excl. shipping
Private Seller
CA
Patek Philippe Minute Repeater Perpetual Calendar 5207G-001 New White gold 41mm Manual winding
Patek Philippe 5207G Minute Repeater Tourbillon Blue Dial UNWORN
C$1,306,310
+ C$103 for shipping
Professional dealer
4.88 (627)
US
Rolex Datejust 41 126334 New Steel 41mm Automatic
Rolex Datejust 41 Stainless Steel Blue Dial Oyster Bracelet...
C$18,819
Free shipping
Professional dealer
4.94 (118)
US

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.