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Doxa GRANDE METRE BLUE PLANET LIMITED EDITION 800PCS WORLD
TOP
Doxa GRANDE METRE BLUE PLANET LIMITED EDITION 800PCS WORLD
C$ 4,689
Free shipping
Seller
Przedsiębiorstwo Handlowe Usługowe
99
PL
Rolex Explorer Precision 5504
TOP
Rolex Explorer Precision 5504
C$ 25,658
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
167
UK
Omega Speedmaster Professional Moonwatch
TOP
Omega Speedmaster Professional Moonwatch
C$ 10,127
Free shipping
Seller
SLS TIME
90
US
Blancpain L-Evolution Chrono Flyback Super Trofeo (Limited...
TOP
Blancpain L-Evolution Chrono Flyback Super Trofeo (Limited...
C$ 20,396
Free shipping
Seller
Istock LTD
80
LV
Omega Seamaster Diver 300 M Chronometer Co-Axial Blue Dial
Omega Seamaster Diver 300 M Chronometer Co-Axial Blue Dial
C$ 3,731
Seller
Koosh Jewelers
 
US
Breitling Super Ocean II
Breitling Super Ocean II
C$ 2,664
Seller
Chronostore
 
US
Omega Seamaster Planet Ocean
Omega Seamaster Planet Ocean
C$ 24,224
Seller
Luxum Watch Group
 
US
Breitling Navitimer World
TOP
Breitling Navitimer World
C$ 6,196
Free shipping
Seller
Brilliance and Grace
55
US
B.R.M MK 44
TOP
B.R.M MK 44
C$ 9,271
Seller
INVEST IN A WATCH
16
FR
Rolex Datejust
TOP
Rolex Datejust
C$ 4,907
Seller
Vintage Watch Services
227
NL
Omega Speedmaster Dark Side of the Moon Black Black 311.92.44....
Omega Speedmaster Dark Side of the Moon Black Black 311.92.44....
C$ 14,124
Seller
Royal Time
49
US
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
C$ 5,263
Free shipping
Seller
SLS TIME
90
US
Blancpain Fifty Fathoms 500 Fathoms GMT (Limited Edition)
TOP
Blancpain Fifty Fathoms 500 Fathoms GMT (Limited Edition)
C$ 30,748
Free shipping
Seller
Istock LTD
80
LV
Panerai PAM01024  Luminor Submersible Automatic Mens 44mm XXX...
Panerai PAM01024 Luminor Submersible Automatic Mens 44mm XXX...
C$ 9,594
Seller
Luxury Discount Store
 
US
Omega Seamaster
Omega Seamaster
C$ 4,263
Seller
Chronostore
 
US
Hublot King Power Unico Titanium Diamonds
TOP
Hublot King Power Unico Titanium Diamonds
C$ 36,465
Seller
Juwelier Burger, since 2001
627
NL
Omega SPEEDMASTER SPEEDMASTER '57 OMEGA CO-AXIAL CHRONOGRAPH
TOP
Omega SPEEDMASTER SPEEDMASTER '57 OMEGA CO-AXIAL CHRONOGRAPH
C$ 8,328
Free shipping
Seller
Brilliance and Grace
55
US
Breitling Transocean Unitime Pilot
Breitling Transocean Unitime Pilot
C$ 10,593
Seller
Aaron Faber Gallery
 
US
Rolex Datejust 41 Blue 18k White Gold/Steel Jubilee 41mm - 126334
TOP
Rolex Datejust 41 Blue 18k White Gold/Steel Jubilee 41mm - 126334
C$ 12,471
Free shipping
Seller
WatchShopping.com Inc.
50
US
Omega Speedmaster Moonwatch Co-Axial Chronograph Automatic...
Omega Speedmaster Moonwatch Co-Axial Chronograph Automatic...
C$ 11,859
Seller
Royal Time
49
US
Omega Speedmaster Racing
TOP
Omega Speedmaster Racing
C$ 4,397
Free shipping
Seller
SLS TIME
90
US
Breitling Navitimer Limited Edition
Breitling Navitimer Limited Edition
C$ 10,527
Free shipping
Seller
Joyce's Fine Jewelry
 
US
Omega 32632405006001 Omega Speedmaster Racing Mens Watch...
Omega 32632405006001 Omega Speedmaster Racing Mens Watch...
C$ 5,063
Seller
Luxury Discount Store
 
US
Breitling Superocean
Breitling Superocean
C$ 4,529
Seller
Chronostore
 
US
Rolex Datejust Pearlmaster 34 White Gold Diamond MOP Dial
TOP
Rolex Datejust Pearlmaster 34 White Gold Diamond MOP Dial
C$ 44,345
Seller
Juwelier Burger, since 2001
627
NL
Omega Seamaster Planet Ocean
TOP
Omega Seamaster Planet Ocean
C$ 10,193
Free shipping
Seller
Brilliance and Grace
55
US
Rolex Air King
TOP
Rolex Air King
C$ 4,609
Seller
Vintage Watch Services
227
NL
Rolex Yacht-Master II White Dial 18K Yellow Gold Oyster Bracelet
Rolex Yacht-Master II White Dial 18K Yellow Gold Oyster Bracelet
C$ 41,305
Seller
Rafaello & Co.
 
US
Omega DeVille Tresor 18KT Sedna Rose Gold Mens Watch 432.53.40...
Omega DeVille Tresor 18KT Sedna Rose Gold Mens Watch 432.53.40...
C$ 11,586
Seller
Royal Time
49
US
Chopard Mille Miglia
TOP
Chopard Mille Miglia
C$ 9,604
Free shipping
Seller
SLS TIME
90
US
Breitling Chronomat 44
Breitling Chronomat 44
C$ 5,596
Free shipping
Seller
Joyce's Fine Jewelry
 
US
Omega 232.30.44.22.01.001 OMEGA SEAMASTER PLANET OCEAN 600 M ...
Omega 232.30.44.22.01.001 OMEGA SEAMASTER PLANET OCEAN 600 M ...
C$ 6,261
Seller
Luxury Discount Store
 
US
Ulysse Nardin Marine
Ulysse Nardin Marine
C$ 5,329
Seller
Chronostore
 
US
Rolex Datejust 41Dark Rhodium Steel/18k White Gold Dia 41mm -...
TOP
Rolex Datejust 41Dark Rhodium Steel/18k White Gold Dia 41mm -...
C$ 14,043
Free shipping
Seller
WatchShopping.com Inc.
50
US
Omega Speedmaster HB-SIA
TOP
Omega Speedmaster HB-SIA
C$ 7,635
Free shipping
Seller
Brilliance and Grace
55
US
Omega Seamaster Diver Co-Axial Chronograph Watch
Omega Seamaster Diver Co-Axial Chronograph Watch
C$ 6,661
Free shipping
Seller
Avital & Co Jewelry
5
US
Omega De Ville St. Moritz Chronometer Co-Axial
Omega De Ville St. Moritz Chronometer Co-Axial
C$ 4,797
Seller
Crown Timepieces
 
US
Omega Seamaster Planet Ocean Men's Watch 232.30.42.21.01.002
Omega Seamaster Planet Ocean Men's Watch 232.30.42.21.01.002
C$ 7,728
Seller
Royal Time
49
US
Omega Seamaster Planet Ocean Olympic Pyeongchang 2018 Special
TOP
Omega Seamaster Planet Ocean Olympic Pyeongchang 2018 Special
C$ 7,462
Free shipping
Seller
SLS TIME
90
US
Rolex Sky-Dweller 42mm Oyster Perpetual 18k Rose Gold 326935
Rolex Sky-Dweller 42mm Oyster Perpetual 18k Rose Gold 326935
C$ 55,831
Seller
Rafaello & Co.
 
US
Omega 21230412001003 OMEGA Seamaster Black Dial Automatic...
Omega 21230412001003 OMEGA Seamaster Black Dial Automatic...
C$ 5,863
Seller
Luxury Discount Store
 
US
Omega Constellation
Omega Constellation
C$ 9,992
Seller
Chronostore
 
US
Montblanc Star
Montblanc Star
C$ 2,100
Seller
Private Seller
CA
Omega Speedmaster Racing
TOP
Omega Speedmaster Racing
C$ 8,261
Free shipping
Seller
Brilliance and Grace
55
US
Rolex Yacht-Master 16622  SS/Plat. 40mm
Rolex Yacht-Master 16622 SS/Plat. 40mm
C$ 8,654
Seller
Angel Timepieces Inc.
 
US
Ulysse Nardin Maxi Marine Chronometer
TOP
Ulysse Nardin Maxi Marine Chronometer
C$ 25,850
Seller
Metals In Time
 
US
Omega Speedmaster MoonPhase Moonwatch 44mm  Steel Watch...
Omega Speedmaster MoonPhase Moonwatch 44mm Steel Watch...
C$ 13,318
Seller
Royal Time
49
US
Omega Seamaster Planet Ocean
TOP
Omega Seamaster Planet Ocean
C$ 11,446
Free shipping
Seller
SLS TIME
90
US
Rolex GMT-Master II Black Dial 18K Yellow Gold Oyster Bracelet
Rolex GMT-Master II Black Dial 18K Yellow Gold Oyster Bracelet
C$ 35,043
Seller
Rafaello & Co.
 
US
TAG Heuer WAR2012.BA0723 NEW TAG HEUER CARRERA CALIBRE 7 TWIN...
TAG Heuer WAR2012.BA0723 NEW TAG HEUER CARRERA CALIBRE 7 TWIN...
C$ 2,516
Seller
Luxury Discount Store
 
US
Omega Seamaster
Omega Seamaster
C$ 5,062
Seller
Chronostore
 
US
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
C$ 4,524
Free shipping
Seller
AJ Watches
117
US
Omega Speedmaster Racing
TOP
Omega Speedmaster Racing
C$ 7,995
Free shipping
Seller
Brilliance and Grace
55
US
Sinn 103 St Sa RB Classic Watch Sondermodell
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
C$ 3,786
Seller
Classic Watch
17
DE
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$ 3,658
Seller
Harley's Time LLC
80
US
Omega Seamaster Aqua Terra Black Dial Automatic Men's Watch...
Omega Seamaster Aqua Terra Black Dial Automatic Men's Watch...
C$ 5,989
Seller
Royal Time
49
US
Breitling Chronomat 41 - AB014112-BB47
TOP
Breitling Chronomat 41 - AB014112-BB47
C$ 8,395
Free shipping
Seller
SLS TIME
90
US
Rolex Day-Date II Black Dial 18K White Gold / President II
Rolex Day-Date II Black Dial 18K White Gold / President II
C$ 45,303
Seller
Rafaello & Co.
 
US
Omega 232.92.42.21.03.001 Omega Seamaster Planet Ocean...
Omega 232.92.42.21.03.001 Omega Seamaster Planet Ocean...
C$ 10,527
Seller
Luxury Discount Store
 
US
TAG Heuer Carrera
TAG Heuer Carrera
C$ 3,063
Seller
Chronostore
 
US
Rolex Sea-Dweller Red
TOP
Rolex Sea-Dweller Red
C$ 18,648
Free shipping
Seller
AJ Watches
117
US
Breitling Navitimer 01
Breitling Navitimer 01
C$ 15,323
Seller
BlackTagWatches
63
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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