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Omega Speedmaster HB-SIA
TOP
Omega Speedmaster HB-SIA
C$ 7,574
Free shipping
Seller
Brilliance and Grace
66
US
Breitling Super Avenger II Chronograph Mens Watch A1337111/BC2...
TOP
Breitling Super Avenger II Chronograph Mens Watch A1337111/BC2...
C$ 5,082
Free shipping
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luxuryfreeshop
134
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Rolex Sea-Dweller
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Rolex Sea-Dweller
C$ 18,504
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Labelle Jewelry
40
US
Breitling CHRONO-MATIC 49
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Breitling CHRONO-MATIC 49
C$ 20,904
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ZEGG & CERLATI
49
MC
Breitling Chronoliner B04 Rose Gold(Limited Edition)
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Breitling Chronoliner B04 Rose Gold(Limited Edition)
C$ 30,709
Free shipping
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Istock LTD
99
LV
Rolex 16550 Explorer II with RARE Transitional Cream Rail Dial...
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Rolex 16550 Explorer II with RARE Transitional Cream Rail Dial...
C$ 34,630
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European Watch Company
153
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Omega Speedmaster Professional Moonwatch Moonphase
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Omega Speedmaster Professional Moonwatch Moonphase
C$ 10,072
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Brilliance and Grace
66
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Breitling Avenger II Seawolf
Breitling Avenger II Seawolf
C$ 3,171
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The Watch Movement
 
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Breitling Galactic 36 Automatic Steel & Rose Gold
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Breitling Galactic 36 Automatic Steel & Rose Gold
C$ 5,948
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King Jewelers
 
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Ulysse Nardin Marine Chronometer Automatic Mens Watch 1183-126...
Ulysse Nardin Marine Chronometer Automatic Mens Watch 1183-126...
C$ 8,453
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Watch Obsession
5
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Omega Seamaster Planet Ocean
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Omega Seamaster Planet Ocean
C$ 4,461
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Barrons
 
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Rolex Datejust 126334
Rolex Datejust 126334
C$ 12,160
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Labelle Jewelry
40
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Omega Speedmaster Moonwatch Dark Side of the Moon Black...
TOP
Omega Speedmaster Moonwatch Dark Side of the Moon Black...
C$ 9,713
Free shipping
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WatchShopping.com Inc.
187
US
L.Leroy Tourbillon Automatic Regulator Chronometer
L.Leroy Tourbillon Automatic Regulator Chronometer
C$ 113,009
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JzandF
 
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Ball GM1020D-LCJ-BK Trainmaster WorldTime Automatic Black Dial...
Ball GM1020D-LCJ-BK Trainmaster WorldTime Automatic Black Dial...
C$ 1,586
Free shipping
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The Watch Outlet
8
US
Omega Speedmaster Professional Moonwatch Moonphase
TOP
Omega Speedmaster Professional Moonwatch Moonphase
C$ 9,715
Free shipping
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Brilliance and Grace
66
US
Breitling Chrono-Matic 1461 (A19360)
Breitling Chrono-Matic 1461 (A19360)
C$ 5,286
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The Watch Movement
 
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Omega Speedmaster Dark Side of the Moon DSOM 44mm NEW 2018
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Omega Speedmaster Dark Side of the Moon DSOM 44mm NEW 2018
C$ 9,912
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Alux Watches
52
US
Hermès Apple Single Tour 38mm Barenia Fauve Calfskin Band...
Hermès Apple Single Tour 38mm Barenia Fauve Calfskin Band...
C$ 2,113
Free shipping
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Watch & Wares
8
US
Ulysse Nardin Maxi Diver Black Dial Automatic Mens Watch...
Ulysse Nardin Maxi Diver Black Dial Automatic Mens Watch...
C$ 6,602
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Watch Obsession
5
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F.P.Journe Chronometre Bleu Tantalum Blue Dial (28840)
F.P.Journe Chronometre Bleu Tantalum Blue Dial (28840)
C$ 38,198
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European Watch Company
153
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Omega Seamaster Aqua Terra 150M Master Chronometer Blue Steel...
TOP
Omega Seamaster Aqua Terra 150M Master Chronometer Blue Steel...
C$ 5,682
Free shipping
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WatchShopping.com Inc.
187
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Breitling Chronomat 41 Two Tone Yellow and White
Breitling Chronomat 41 Two Tone Yellow and White
C$ 10,573
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Haniken Jewelers
 
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Rolex Oyster Perpetual Day-Date President 18038 Mens Watch
TOP
Rolex Oyster Perpetual Day-Date President 18038 Mens Watch
C$ 15,199
Free shipping
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Phigora
178
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Omega Speedmaster Racing
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Omega Speedmaster Racing
C$ 7,798
Free shipping
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Brilliance and Grace
66
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Breitling Transocean Unitime Pilot
Breitling Transocean Unitime Pilot
C$ 6,607
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The Watch Movement
 
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L.Leroy Marine Automatic Deck Chronometer 18K RG Power Reserve
L.Leroy Marine Automatic Deck Chronometer 18K RG Power Reserve
C$ 25,219
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JzandF
 
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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$ 1,315
Free shipping
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Time Machine Plus
6
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Breitling Chronomat 44 Steel Automatic Chronograph Men's Watch...
Breitling Chronomat 44 Steel Automatic Chronograph Men's Watch...
C$ 8,922
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Watch Obsession
5
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Rolex 116900 AIR-KING 40MM STEEL BLACK DIAL OYSTER PERPETUAL...
Rolex 116900 AIR-KING 40MM STEEL BLACK DIAL OYSTER PERPETUAL...
C$ 7,732
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The Watch Outlet
8
US
Omega Seamaster 300 Black Steel 41mm - 233.30.41.21.01.001
TOP
Omega Seamaster 300 Black Steel 41mm - 233.30.41.21.01.001
C$ 5,603
Free shipping
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WatchShopping.com Inc.
187
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Omega 2500 Seamaster Chronometer Aqua Terra 36mm Mens Watch
Omega 2500 Seamaster Chronometer Aqua Terra 36mm Mens Watch
C$ 3,166
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LVL GROUP INC
7
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Rolex 1500 Perpetual Date Chronometer 14k Yellow Gold Men's Watch
Rolex 1500 Perpetual Date Chronometer 14k Yellow Gold Men's Watch
C$ 11,235
Free shipping
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8
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Omega Speedmaster Racing
TOP
Omega Speedmaster Racing
C$ 7,930
Free shipping
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Brilliance and Grace
66
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Rolex Oyster Perpetual Submariner Date 16613 Mens Watch
TOP
Rolex Oyster Perpetual Submariner Date 16613 Mens Watch
C$ 10,837
Free shipping
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Phigora
178
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L.Leroy Men’s Watch Marine Automatic Deck Chronometer 18K Rose...
L.Leroy Men’s Watch Marine Automatic Deck Chronometer 18K Rose...
C$ 25,219
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JzandF
 
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Breitling Avenger Rattrapante / Super Limited Edition 25 Pieces
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Breitling Avenger Rattrapante / Super Limited Edition 25 Pieces
C$ 152,027
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Pawndeluxe
141
NL
Ulysse Nardin Marine Chronometer Automatic Mens Watch 1183-122-42
Ulysse Nardin Marine Chronometer Automatic Mens Watch 1183-122-42
C$ 8,585
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Ball WATCH ENGINEER HYDROCARBON AIRBORNE MEN'S 42MM WATCH...
Ball WATCH ENGINEER HYDROCARBON AIRBORNE MEN'S 42MM WATCH...
C$ 2,517
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The Watch Outlet
8
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Omega Speedmaster 38 Chronograph Black Steel 38mm - 324.30.38....
TOP
Omega Speedmaster 38 Chronograph Black Steel 38mm - 324.30.38....
C$ 4,519
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WatchShopping.com Inc.
187
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Breitling Navitimer Heritage Blue Dial
Breitling Navitimer Heritage Blue Dial
C$ 5,286
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The Watch Movement
 
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Hublot Red Devil Big Bang
Hublot Red Devil Big Bang
C$ 12,499
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Private Seller
CA
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
C$ 5,089
Free shipping
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Brilliance and Grace
66
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Rolex Oyster Perpetual Explorer II 216570 Mens Watch
TOP
Rolex Oyster Perpetual Explorer II 216570 Mens Watch
C$ 9,647
Free shipping
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Phigora
178
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L.Leroy 18K WG Tourbillon Regulator Chronometer LL104-1
L.Leroy 18K WG Tourbillon Regulator Chronometer LL104-1
C$ 113,009
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JzandF
 
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Ulysse Nardin Maxi Marine Chronometer
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Ulysse Nardin Maxi Marine Chronometer
C$ 25,642
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Metals In Time
5
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Ulysse Nardin Marine Stainless Steel Automatic Mens Watch...
Ulysse Nardin Marine Stainless Steel Automatic Mens Watch...
C$ 9,550
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Watch Obsession
5
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Rolex Oyster Perpetual 36mm Men's Steel No-Date Black Arabic...
Rolex Oyster Perpetual 36mm Men's Steel No-Date Black Arabic...
C$ 5,287
Free shipping
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The Watch Outlet
8
US
Rolex Datejust 41 White MOP Steel/18k White Gold Dia 41mm -...
TOP
Rolex Datejust 41 White MOP Steel/18k White Gold Dia 41mm -...
C$ 16,401
Free shipping
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WatchShopping.com Inc.
187
US
Eterna Super Kontiki Chronograph
Eterna Super Kontiki Chronograph
Price on request
Seller
Atelier Lou
 
CA
Omega Seamaster Aqua Terra GMT
Omega Seamaster Aqua Terra GMT
C$ 5,000
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Private Seller
CA
Rolex Datejust 41mm 126334 silver dial  Jubilee band
Rolex Datejust 41mm 126334 silver dial Jubilee band
C$ 11,598
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Harley's Time LLC
137
US
Breitling Chronomat Evolution A13356 Automatic 44mm Chronograph
TOP
Breitling Chronomat Evolution A13356 Automatic 44mm Chronograph
C$ 4,493
Free shipping
Seller
Phigora
178
US
Carl F. Bucherer 18K Rose Gold Manero Perpetual Calendar...
Carl F. Bucherer 18K Rose Gold Manero Perpetual Calendar...
C$ 23,130
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JzandF
 
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Omega Seamaster Planet Ocean
TOP
Omega Seamaster Planet Ocean
C$ 4,626
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Scorpio Luxury Corp
21
US
Ulysse Nardin Marine Chronometer Blue Dial - FULL SET / 263-67
TOP
Ulysse Nardin Marine Chronometer Blue Dial - FULL SET / 263-67
C$ 5,473
Free shipping
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Pawndeluxe
141
NL
Breitling Navitimer 46mm World GMT Blue Dial Brown Leather...
Breitling Navitimer 46mm World GMT Blue Dial Brown Leather...
C$ 5,329
Free shipping
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The Watch Outlet
8
US
Omega Speedmaster Moonwatch Dark Side of the Moon "Black...
TOP
Omega Speedmaster Moonwatch Dark Side of the Moon "Black...
C$ 10,784
Free shipping
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WatchShopping.com Inc.
187
US
Bremont Endurance
Bremont Endurance
Price on request
Seller
Atelier Lou
 
CA
Omega Seamaster Planet Ocean
Omega Seamaster Planet Ocean
C$ 5,969
Free shipping
Seller
Rocky Mountain Pawn Ltd.
CA
Breitling Chronomat Blackbird Men's Watch A4436010/bb71 Nib...
Breitling Chronomat Blackbird Men's Watch A4436010/bb71 Nib...
Price on request
Seller
Watch Obsession
5
US
Rolex Oyster Perpetual Milgauss Custom PVD 116400
TOP
Rolex Oyster Perpetual Milgauss Custom PVD 116400
C$ 10,573
Free shipping
Seller
Phigora
178
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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