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Breitling Avenger Seawolf Diamond Bezel 2.00 CARATS A73390
TOP
Breitling Avenger Seawolf Diamond Bezel 2.00 CARATS A73390
C$ 5,787
Seller
Swiss Moves
62
US
Chopard Grand Prix de Monaco Historique Chronograph Silver...
TOP
Chopard Grand Prix de Monaco Historique Chronograph Silver...
C$ 8,425
Free shipping
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WatchShopping.com Inc.
311
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Rolex Pearlmaster Datejust 69318
TOP
Rolex Pearlmaster Datejust 69318
C$ 22,873
Free shipping
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Watches & Jewellery of Bond Street Ltd
235
UK
Chopard Two O Ten Tycoon
TOP
Chopard Two O Ten Tycoon
C$ 5,003
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Eternity Jewelry Corp dba Happy Jewelers
15
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Omega Constellation Pie Pan 18K Gold Automatic Service 09/18
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Omega Constellation Pie Pan 18K Gold Automatic Service 09/18
C$ 6,057
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Timeless Watches GmbH
247
DE
Breitling Superocean II 44 - A17392D8/C910-162A
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Breitling Superocean II 44 - A17392D8/C910-162A
C$ 3,818
Free shipping
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Chrono Hour Passion
200
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Omega Seamaster Diver 300m Co-Axial 41mm Blue Steel - 212.30.4...
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Omega Seamaster Diver 300m Co-Axial 41mm Blue Steel - 212.30.4...
C$ 3,936
Free shipping
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WatchShopping.com Inc.
311
US
Breitling Galactic 36 Automatic Steel & Rose Gold
Breitling Galactic 36 Automatic Steel & Rose Gold
C$ 5,925
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King Jewelers
 
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Rolex 16700 16700 GMT Master Red / Blue Pepsi Bezel (29479)
Rolex 16700 16700 GMT Master Red / Blue Pepsi Bezel (29479)
C$ 14,352
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European Watch Company
169
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Edox Limited Edition Miss GEICO Racing Chronoffshore-One
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Edox Limited Edition Miss GEICO Racing Chronoffshore-One
C$ 1,310
Free shipping
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Time Machine Plus
9
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Omega CO-AXIAL GMT 43.5MM 232.90.44.22.03.001
Omega CO-AXIAL GMT 43.5MM 232.90.44.22.03.001
C$ 9,133
Free shipping
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Exquisite Timepieces
21
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Breitling Avenger Rattrapante / Super Limited Edition 25 Pieces
TOP
Breitling Avenger Rattrapante / Super Limited Edition 25 Pieces
C$ 151,814
Free shipping
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Pawndeluxe
187
NL
Rolex Date - Under Factory Warranty & Original Papers
Rolex Date - Under Factory Warranty & Original Papers
C$ 7,834
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Horology 411
 
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Rolex Sea-Dweller Sea-Dweller 126600 SD43 NEW
Rolex Sea-Dweller Sea-Dweller 126600 SD43 NEW
C$ 19,678
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Kara's Watches
160
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Breitling Super Avenger II - A1337111/BC28-168A
TOP
Breitling Super Avenger II - A1337111/BC28-168A
C$ 5,372
Free shipping
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Chrono Hour Passion
200
US
Omega Seamaster Aqua Terra 150M Master Chronometer Blue Steel...
TOP
Omega Seamaster Aqua Terra 150M Master Chronometer Blue Steel...
C$ 5,792
Free shipping
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WatchShopping.com Inc.
311
US
Chopard Mille Miglia Power Reserve
Chopard Mille Miglia Power Reserve
C$ 5,924
Free shipping
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Express Watches
6
US
Omega 233.32.41.21.01.001 Omega Seamaster 300M Limited Edition...
Omega 233.32.41.21.01.001 Omega Seamaster 300M Limited Edition...
C$ 15,669
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European Watch Company
169
US
Omega Sea Diver 300 blue dial 42 mm Co-Axial Chronometer
Omega Sea Diver 300 blue dial 42 mm Co-Axial Chronometer
C$ 5,234
Seller
Harley's Time LLC
178
US
Omega Diver 300M Co-Axial 41mm 212.30.41.20.01.003
Omega Diver 300M Co-Axial 41mm 212.30.41.20.01.003
C$ 4,082
Free shipping
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Exquisite Timepieces
21
US
Chopard Mille Miglia Jacky ICKX - Limited Edition Piece 2/1000...
TOP
Chopard Mille Miglia Jacky ICKX - Limited Edition Piece 2/1000...
C$ 5,086
Free shipping
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Pawndeluxe
187
NL
Rolex Air King - Unpolished - Serviced & 3 Year Warranty
Rolex Air King - Unpolished - Serviced & 3 Year Warranty
C$ 4,823
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Horology 411
 
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Omega SPEEDMASTER SPEEDMASTER '57 OMEGA CO-AXIAL CHRONOGRAPH
TOP
Omega SPEEDMASTER SPEEDMASTER '57 OMEGA CO-AXIAL CHRONOGRAPH
C$ 8,229
Free shipping
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Brilliance and Grace
72
US
Breitling Colt Chronograph Automatic - A1338811/C914-173A
TOP
Breitling Colt Chronograph Automatic - A1338811/C914-173A
C$ 5,333
Free shipping
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Chrono Hour Passion
200
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Omega Seamaster Planet Ocean 600M Master Chronometer Black...
TOP
Omega Seamaster Planet Ocean 600M Master Chronometer Black...
C$ 8,425
Free shipping
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WatchShopping.com Inc.
311
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Rolex Datejust 41 Blue Index
Rolex Datejust 41 Blue Index
C$ 11,980
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Labelle Jewelry
50
US
Rolex 116660 Sea Dweller Deep Sea (29188)
Rolex 116660 Sea Dweller Deep Sea (29188)
C$ 12,838
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European Watch Company
169
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Rolex Datejust 41 mm 126334 rhodium jubilee band
Rolex Datejust 41 mm 126334 rhodium jubilee band
C$ 11,830
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Harley's Time LLC
178
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Omega Co-Axial Chronograph 44.25mm 311.92.44.51.01.003
Omega Co-Axial Chronograph 44.25mm 311.92.44.51.01.003
C$ 11,916
Free shipping
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Exquisite Timepieces
21
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Blancpain Ultra Thin Chronometer 36 mm - 65531127
TOP
Blancpain Ultra Thin Chronometer 36 mm - 65531127
C$ 5,162
Free shipping
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Pawndeluxe
187
NL
Omega Speedmaster Mark II Co-Axial Chronograph
Omega Speedmaster Mark II Co-Axial Chronograph
C$ 4,968
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Horology 411
 
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Omega Seamaster Planet Ocean
TOP
Omega Seamaster Planet Ocean
C$ 10,073
Free shipping
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Brilliance and Grace
72
US
Breitling Navitimer World A2432212/B726-441x
TOP
Breitling Navitimer World A2432212/B726-441x
C$ 6,057
Free shipping
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Chrono Hour Passion
200
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Omega Seamaster Aqua Terra 150M Master Chronometer Black Steel...
TOP
Omega Seamaster Aqua Terra 150M Master Chronometer Black Steel...
C$ 4,936
Free shipping
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WatchShopping.com Inc.
311
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Rolex Datejust 41 Steel & White Gold Blue Diamond  Jubilee ...
Rolex Datejust 41 Steel & White Gold Blue Diamond Jubilee ...
C$ 14,746
Free shipping
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Avi & Co NY
83
US
Rolex 116718 GMT Master II Green Dial 18K Yellow Gold /...
Rolex 116718 GMT Master II Green Dial 18K Yellow Gold /...
C$ 34,892
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European Watch Company
169
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Hublot Manchester United Red Devil Big Bang Limited Edition
Hublot Manchester United Red Devil Big Bang Limited Edition
C$ 12,499
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Private Seller
CA
Omega Planet Ocean 600M 215.92.44.21.99.001
Omega Planet Ocean 600M 215.92.44.21.99.001
C$ 6,518
Free shipping
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Exquisite Timepieces
21
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Omega Seamaster Planet Ocean 600M Chrono 215.33.46.51.03.001 NEW
Omega Seamaster Planet Ocean 600M Chrono 215.33.46.51.03.001 NEW
C$ 7,696
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Kara's Watches
160
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Rolex Datejust
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Rolex Datejust
C$ 4,951
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Vintage Watch Services
268
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Omega Speedmaster Moowatch Co-Axial Master Moonphase Chronog
Omega Speedmaster Moowatch Co-Axial Master Moonphase Chronog
C$ 9,612
Free shipping
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Watch Overkill
 
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Omega Seamaster Planet Ocean Chronograph 215.90.46.51.99.001
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Omega Seamaster Planet Ocean Chronograph 215.90.46.51.99.001
C$ 8,953
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Chrono Hour Passion
200
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Omega Seamaster Diver 300m Co-Axial 41mm Black Steel -...
TOP
Omega Seamaster Diver 300m Co-Axial 41mm Black Steel -...
C$ 3,857
Free shipping
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WatchShopping.com Inc.
311
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Chopard Mille Miglia
Chopard Mille Miglia
C$ 5,660
Free shipping
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Express Watches
6
US
F.P.Journe Holland & Holland Chronometre Holland & Holland SS...
F.P.Journe Holland & Holland Chronometre Holland & Holland SS...
C$ 78,343
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European Watch Company
169
US
Ulysse Nardin Maxi Marine Diver
Ulysse Nardin Maxi Marine Diver
C$ 23,569
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Chad Warrick
14
US
Omega Aquaterra 150M Omega Master Co-Axial 231.20.42.21.02.001...
Omega Aquaterra 150M Omega Master Co-Axial 231.20.42.21.02.001...
C$ 10,402
Free shipping
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Exquisite Timepieces
21
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Rolex Day-Date President Pink MOP Roman  Diamond Dial Bezel 18038
TOP
Rolex Day-Date President Pink MOP Roman Diamond Dial Bezel 18038
C$ 19,749
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Watch My Diamonds
148
US
Rolex Datejust 41mm  Navy Blue  Index Jubilee 126334
Rolex Datejust 41mm Navy Blue Index Jubilee 126334
C$ 11,975
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Harley's Time LLC
178
US
Omega Seamaster Planet Ocean Co-Axial Black 37.5mm
Omega Seamaster Planet Ocean Co-Axial Black 37.5mm
C$ 4,977
Free shipping
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The Luxury Well
149
US
Breitling Super Avenger II - A1337111/BC29/168A
TOP
Breitling Super Avenger II - A1337111/BC29/168A
C$ 4,872
Free shipping
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Chrono Hour Passion
200
US
Omega Seamaster Diver 300m Black Steel 41.5mm - 212.30.42.50.0...
TOP
Omega Seamaster Diver 300m Black Steel 41.5mm - 212.30.42.50.0...
C$ 5,226
Free shipping
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WatchShopping.com Inc.
311
US
Omega Aqua Terra 8500 - Skyfall Blue - 41.5mm
Omega Aqua Terra 8500 - Skyfall Blue - 41.5mm
C$ 5,728
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Watch Exchange Co.
133
US
Rolex 126660 Sea Dweller Deep Sea NEW 2018 MODEL (29756)
Rolex 126660 Sea Dweller Deep Sea NEW 2018 MODEL (29756)
C$ 18,302
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European Watch Company
169
US
Gérald Genta Arena Sport Retro SSPL10 Men's Watch - Papers
TOP
Gérald Genta Arena Sport Retro SSPL10 Men's Watch - Papers
C$ 3,947
Free shipping
Seller
Pawndeluxe
187
NL
Ball Watch Engineer II Arabic Chronometer NM2026C-L2CA-BK
Ball Watch Engineer II Arabic Chronometer NM2026C-L2CA-BK
C$ 3,554
Free shipping
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Exquisite Timepieces
21
US
Rolex Datejust 126334 Slate Roman
Rolex Datejust 126334 Slate Roman
C$ 12,113
Seller
Labelle Jewelry
50
US
Omega Sea Diver 300  grey wave 42mm Co-Axial Chronometer
Omega Sea Diver 300 grey wave 42mm Co-Axial Chronometer
C$ 5,602
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Harley's Time LLC
178
US
Omega Seamaster Planet Ocean Liquidmetal Blue Titanium 42
Omega Seamaster Planet Ocean Liquidmetal Blue Titanium 42
C$ 6,425
Free shipping
Seller
The Luxury Well
149
US
Breitling Avenger Blackbird V1731010/BD12-100w
TOP
Breitling Avenger Blackbird V1731010/BD12-100w
C$ 4,470
Free shipping
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Chrono Hour Passion
200
US
Omega Speedmaster Moonwatch Moonphase Chronograph Black Steel...
TOP
Omega Speedmaster Moonwatch Moonphase Chronograph Black Steel...
C$ 9,044
Free shipping
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WatchShopping.com Inc.
311
US
Omega Speedmaster Dark Side of the Moon - Factory Warranty - NEW
Omega Speedmaster Dark Side of the Moon - Factory Warranty - NEW
C$ 9,869
Seller
Watch Exchange Co.
133
US
Blancpain 7002-1127-55 Ultra Thin White Dial Manual Wind...
Blancpain 7002-1127-55 Ultra Thin White Dial Manual Wind...
C$ 8,888
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European Watch Company
169
US
Rolex Oyster Perpetual RARE Caramel Mid Size  31 18K Gold - 67488
TOP
Rolex Oyster Perpetual RARE Caramel Mid Size 31 18K Gold - 67488
C$ 7,287
Free shipping
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Pawndeluxe
187
NL
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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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