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Breitling Colt Automatic Chronograph Steel/Steel
TOP
Breitling Colt Automatic Chronograph Steel/Steel
C$ 4,448
Free shipping
Seller
The Luxury Well
168
US
Rolex Day-Date Dinosaur Egg Tridor Gold 18239B
TOP
Rolex Day-Date Dinosaur Egg Tridor Gold 18239B
C$ 34,241
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
265
UK
Chopard Two O Ten Tycoon
TOP
Chopard Two O Ten Tycoon
C$ 5,153
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Eternity Jewelry Corp dba Happy Jewelers
17
US
Rolex Yacht-Master II SS/Everose Gold White Dial - 116681
TOP
Rolex Yacht-Master II SS/Everose Gold White Dial - 116681
C$ 25,089
Free shipping
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Certified Luxury Watches
91
US
Bremont Martin Baker III
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C$ 5,995
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Atelier Lou
 
CA
Hamilton Khaki X-Wind LIMITED EDITION
Hamilton Khaki X-Wind LIMITED EDITION
C$ 3,007
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Mani Jewellers
 
CA
Rolex Men's Steel 40mm Submariner Date Box Books Black Dial Bezel
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Rolex Men's Steel 40mm Submariner Date Box Books Black Dial Bezel
C$ 10,425
Free shipping
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Mt. Vernon Specialties
13
US
Hublot Big Bang Pop Art King Gold Apple (Limited Edition)
TOP
Hublot Big Bang Pop Art King Gold Apple (Limited Edition)
C$ 30,379
Free shipping
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Istock LTD
120
LV
Omega Speedmaster Racing 326.30.40.50.06.001
TOP
Omega Speedmaster Racing 326.30.40.50.06.001
C$ 4,204
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Scorpio Luxury Corp
36
US
Omega Speedmaster Dark Side of the Moon - Factory Warranty - NEW
TOP
Omega Speedmaster Dark Side of the Moon - Factory Warranty - NEW
C$ 10,273
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Watch Exchange Co.
147
US
Rolex Datejust 126334 Slate Roman
Rolex Datejust 126334 Slate Roman
C$ 12,477
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Labelle Jewelry
59
US
Rolex Sea-Dweller Sea-Dweller 126600 SD43 NEW
Rolex Sea-Dweller Sea-Dweller 126600 SD43 NEW
C$ 18,844
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Kara's Watches
181
US
Patek Philippe Grand Complication
Patek Philippe Grand Complication
C$ 406,848
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TIMEVAULT
 
US
Eterna Super Kontiki Chronograph
Eterna Super Kontiki Chronograph
C$ 5,995
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Atelier Lou
 
CA
A. Lange & Söhne A  1815 Up & Down 221.021 36MM Power Reserve...
A. Lange & Söhne A 1815 Up & Down 221.021 36MM Power Reserve...
C$ 20,336
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ExpertsWatches
 
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Rolex Datejust 41 Steel & White Gold Blue Index Dial  126334
Rolex Datejust 41 Steel & White Gold Blue Index Dial 126334
C$ 12,882
Free shipping
Seller
Avi & Co NY
100
US
Breitling Chronoliner B04 Rose Gold(Limited Edition)
TOP
Breitling Chronoliner B04 Rose Gold(Limited Edition)
C$ 28,837
Free shipping
Seller
Istock LTD
120
LV
Omega Speedmaster Racing 326.30.40.50.06.001
TOP
Omega Speedmaster Racing 326.30.40.50.06.001
C$ 4,204
Seller
Scorpio Luxury Corp
36
US
Omega Planet Ocean 42mm Titanium - Blue - Unworn Condition
TOP
Omega Planet Ocean 42mm Titanium - Blue - Unworn Condition
C$ 6,476
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Watch Exchange Co.
147
US
Rolex Datejust 41 126334 Slate Roman
Rolex Datejust 41 126334 Slate Roman
C$ 12,382
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Labelle Jewelry
59
US
Omega Seamaster Aqua Terra 150M NEW Silver 220.12.41.21.02.002
Omega Seamaster Aqua Terra 150M NEW Silver 220.12.41.21.02.002
C$ 5,418
Seller
Kara's Watches
181
US
F.P.Journe Chronometre Resonance Platinum Silver Dial 40MM...
F.P.Journe Chronometre Resonance Platinum Silver Dial 40MM...
C$ 66,316
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European Watch Company
190
US
Tutima Grand Flieger Airport Chronograph
Tutima Grand Flieger Airport Chronograph
C$ 4,895
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Atelier Lou
 
CA
Omega Constellation Gold on Steel Cal 564 168.010 Pie Pan 1970s
Omega Constellation Gold on Steel Cal 564 168.010 Pie Pan 1970s
C$ 2,577
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ExpertsWatches
 
US
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
C$ 4,950
Free shipping
Seller
Brilliance and Grace
76
US
Rolex Sea-Dweller "Red" PVD/DLC Steel Ceramic Watch 126600
Rolex Sea-Dweller "Red" PVD/DLC Steel Ceramic Watch 126600
C$ 19,934
Free shipping
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Avi & Co NY
100
US
Omega Speedmaster Racing 326.30.40.50.06.001
TOP
Omega Speedmaster Racing 326.30.40.50.06.001
C$ 4,204
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Scorpio Luxury Corp
36
US
Breitling Bentley 6.75
Breitling Bentley 6.75
C$ 10,029
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The Watch Connection
 
US
Ulysse Nardin Maxi Marine Diver
Ulysse Nardin Maxi Marine Diver
C$ 24,275
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Chad Warrick
16
US
Omega Seamaster Aqua Terra 150M NEW Golf Black 220.12.41.21.01...
Omega Seamaster Aqua Terra 150M NEW Golf Black 220.12.41.21.01...
C$ 4,875
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Kara's Watches
181
US
Rolex 1675 GMT Master "Blueberry" MKII SS (30054)
Rolex 1675 GMT Master "Blueberry" MKII SS (30054)
C$ 54,111
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European Watch Company
190
US
Bremont Endurance
Bremont Endurance
C$ 6,995
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Atelier Lou
 
CA
Omega SeaMaster Chronograph Cal 321 Watch CK 2947 Box & Papers
Omega SeaMaster Chronograph Cal 321 Watch CK 2947 Box & Papers
C$ 6,781
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ExpertsWatches
 
US
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
C$ 4,814
Free shipping
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Brilliance and Grace
76
US
Rolex Datejust 41 Steel & White Gold Black Diamond Jubilee 126334
Rolex Datejust 41 Steel & White Gold Black Diamond Jubilee 126334
C$ 14,916
Free shipping
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Avi & Co NY
100
US
Rolex Bubble Back (C24-54)
Rolex Bubble Back (C24-54)
C$ 6,577
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Knight Watch & Jewelry Co.
7
US
Breitling Chronomat 44 Airborne
Breitling Chronomat 44 Airborne
C$ 7,459
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The Watch Connection
 
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Omega Seamaster Diver 300 M Blue dial 212.30.41.20.03.001
Omega Seamaster Diver 300 M Blue dial 212.30.41.20.03.001
C$ 3,980
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Harley's Time LLC
227
US
Omega Seamaster Railmaster Black NEW 220.10.40.20.01.001
Omega Seamaster Railmaster Black NEW 220.10.40.20.01.001
C$ 5,418
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Kara's Watches
181
US
Rolex 16600 Sea Dweller SS FULL SET (30071)
Rolex 16600 Sea Dweller SS FULL SET (30071)
C$ 12,884
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European Watch Company
190
US
Rolex : Explorer II :  16570 :  Stainless Steel : black...
Rolex : Explorer II : 16570 : Stainless Steel : black...
C$ 6,143
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Bernard Watch Co.
287
US
Rolex Oyster Perpetual 6564 Watch NEW TUBE & CROWN CAL 1030 W/...
Rolex Oyster Perpetual 6564 Watch NEW TUBE & CROWN CAL 1030 W/...
C$ 2,984
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ExpertsWatches
 
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Omega Speedmaster Racing
TOP
Omega Speedmaster Racing
C$ 7,703
Free shipping
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Brilliance and Grace
76
US
Ulysse Nardin Marine Chronometer Manufacture
Ulysse Nardin Marine Chronometer Manufacture
C$ 37,972
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Chad Warrick
16
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Omega Constellation Chronometer Pie Pan
TOP
Omega Constellation Chronometer Pie Pan
C$ 2,814
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Vintage Watch Services
305
NL
Roger Dubuis Sympathie
Roger Dubuis Sympathie
C$ 40,007
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Beverly Hills Watch Company
34
US
Omega Sea Master Diver 300 blue dial 42 mm Co-Axial Chro
Omega Sea Master Diver 300 blue dial 42 mm Co-Axial Chro
C$ 5,391
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Harley's Time LLC
227
US
Omega Seamaster Planet Ocean Big Blue 600 M GMT NEW
Omega Seamaster Planet Ocean Big Blue 600 M GMT NEW
C$ 10,232
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Kara's Watches
181
US
Rolex 16710 GMT Master II SS Red / Blue Pepsi Bezel (30077)
Rolex 16710 GMT Master II SS Red / Blue Pepsi Bezel (30077)
C$ 16,138
Seller
European Watch Company
190
US
Rolex : GMT-Master II :  116710 :  Stainless Steel : black dial
Rolex : GMT-Master II : 116710 : Stainless Steel : black dial
C$ 10,754
Seller
Bernard Watch Co.
287
US
Omega REF 2279-2 Pre SpeedMaster Cal 321 Chronograph Watch
Omega REF 2279-2 Pre SpeedMaster Cal 321 Chronograph Watch
C$ 6,781
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ExpertsWatches
 
US
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
C$ 4,780
Free shipping
Seller
Brilliance and Grace
76
US
Rolex Datejust 41 Steel & White Gold Blue Diamond  Jubilee ...
Rolex Datejust 41 Steel & White Gold Blue Diamond Jubilee ...
C$ 15,188
Free shipping
Seller
Avi & Co NY
100
US
Omega Constellation Chronometer
TOP
Omega Constellation Chronometer
C$ 1,888
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Vintage Watch Services
305
NL
TAG Heuer Carrera Automatic Leather Mens Watch
TAG Heuer Carrera Automatic Leather Mens Watch
C$ 3,413
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Jacob Time
 
US
Omega Seamaster Diver 300 M Black dial 212.30.41.20.01.003
Omega Seamaster Diver 300 M Black dial 212.30.41.20.01.003
C$ 3,980
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Harley's Time LLC
227
US
Omega Speedmaster Moonwatch Moonphase NEW 304.30.44.52.01.00
Omega Speedmaster Moonwatch Moonphase NEW 304.30.44.52.01.00
C$ 9,215
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Kara's Watches
181
US
Rolex 116758SA GMT Master II Yellow Gold Pave Dial / Sapphire...
Rolex 116758SA GMT Master II Yellow Gold Pave Dial / Sapphire...
C$ 125,445
Seller
European Watch Company
190
US
Rolex : Submariner Date :  16610 :  Stainless Steel : black dial
Rolex : Submariner Date : 16610 : Stainless Steel : black dial
C$ 10,890
Seller
Bernard Watch Co.
287
US
Omega Chronograph CAL 27 PRE SpeedMaster PRE 321 2279-2 Watch...
Omega Chronograph CAL 27 PRE SpeedMaster PRE 321 2279-2 Watch...
C$ 6,781
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ExpertsWatches
 
US
Omega Seamaster Diver 300 M
TOP
Omega Seamaster Diver 300 M
C$ 5,423
Free shipping
Seller
Brilliance and Grace
76
US
Hublot Manchester United Red Devil Big Bang Limited Edition
Hublot Manchester United Red Devil Big Bang Limited Edition
C$ 12,499
Seller
Private Seller
CA
Panerai Luminor 1950 Stainless Steel Watch PAM00127
Panerai Luminor 1950 Stainless Steel Watch PAM00127
C$ 26,444
Free shipping
Seller
Avi & Co NY
100
US
Omega Seamaster Planet Ocean
Omega Seamaster Planet Ocean
C$ 10,019
Seller
Chad Warrick
16
US
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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.

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