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Breitling Navitimer Cosmonaute 18kt Limited Edition (XX/250)
Top
Breitling Navitimer Cosmonaute 18kt Limited Edition (XX/250)
C$ 16,164
Free shipping
Seller
The Luxury Well
35
US
Breitling Chronomat 44 Blacksteel (Yellow)
Top
Breitling Chronomat 44 Blacksteel (Yellow)
C$ 6,575
Free shipping
Seller
The Luxury Well
35
US
Rolex Yacht-Master II Edelstahl / Rosegold Ref. 116681
Top
Rolex Yacht-Master II Edelstahl / Rosegold Ref. 116681
C$ 27,258
Seller
Uhren2000 GmbH
206
DE
Omega SPEEDMASTER BROAD ARROW Ref. 3851.20.00/35512000
Top
Omega SPEEDMASTER BROAD ARROW Ref. 3851.20.00/35512000
C$ 4,766
Seller
WINGOO WATCHES
180
IT
Rolex Day-Date Tridor Masterpiece Meteorite Diamond Dial
Top
Rolex Day-Date Tridor Masterpiece Meteorite Diamond Dial
C$ 58,836
Seller
Juwelier Burger, since 2001
406
NL
Sinn 103 St Sa RB Classic Watch Sondermodell
Top
Sinn 103 St Sa RB Classic Watch Sondermodell
C$ 3,560
Seller
Classic Watch
 
DE
Omega Constellation Chronometer Pie Pan dial
Top
Omega Constellation Chronometer Pie Pan dial
C$ 1,472
Seller
Vintage Watch Services
87
NL
Rolex Submariner Date
Top
Rolex Submariner Date
C$ 11,830
Seller
Ari's Luxury Watch
 
US
Omega Seamaster Diver 300 M
Omega Seamaster Diver 300 M
C$ 1,700
Seller
Private seller
CA
Rolex Oyster Perpetual Datejust 18K YG & SS 16233
Top
Rolex Oyster Perpetual Datejust 18K YG & SS 16233
C$ 6,101
Seller
Phigora
63
US
Paul Picot Atelier 18K Solid Gold Chronometer Rattrapante
Top
Paul Picot Atelier 18K Solid Gold Chronometer Rattrapante
C$ 10,454
Seller
Swiss Moves
18
US
Breitling Navitimer 01  Blacksteel 46 mm MB012822.BE51.252S.M2...
Top
Breitling Navitimer 01 Blacksteel 46 mm MB012822.BE51.252S.M2...
C$ 10,114
Seller
Uhren2000 GmbH
206
DE
Omega De Ville Prestige Co-Axial Hour Vision Ref. 433.33.41.21...
Top
Omega De Ville Prestige Co-Axial Hour Vision Ref. 433.33.41.21...
C$ 6,733
Seller
WINGOO WATCHES
180
IT
Omega Seamaster  (16219)
Top
Omega Seamaster (16219)
C$ 6,101
Seller
Chronostore
91
US
Rolex Lady-Presidential/Datejust
Top
Rolex Lady-Presidential/Datejust
C$ 12,764
Free shipping
Seller
The Castle Jewelry
 
US
Carl F. Bucherer Patravi Travelgraph 18k Yellow Gold GMT
Top
Carl F. Bucherer Patravi Travelgraph 18k Yellow Gold GMT
C$ 8,094
Free shipping
Seller
Daniele Trissi
7
US
Bremont Martin-Baker Orange MBII/OR
Top
Bremont Martin-Baker Orange MBII/OR
C$ 4,956
Free shipping
Seller
The Luxury Well
35
US
Montblanc Star
Montblanc Star
C$ 2,100
Seller
Private seller
CA
Omega Constellation 1202.10 Automatic 18K YG/SS
Top
Omega Constellation 1202.10 Automatic 18K YG/SS
C$ 2,863
Seller
Phigora
63
US
Breitling Crosswind Chronograph Windrider Racing Polished like...
Top
Breitling Crosswind Chronograph Windrider Racing Polished like...
C$ 5,847
Seller
Swiss Moves
18
US
Tudor Heritage Black Bay Automatik Dark 79230DK Lederband
Top
Tudor Heritage Black Bay Automatik Dark 79230DK Lederband
C$ 4,379
Seller
Uhren2000 GmbH
206
DE
Omega Mens CONSTELLATION Day-Date 38 mm S/Steel & 18k Watch
Top
Omega Mens CONSTELLATION Day-Date 38 mm S/Steel & 18k Watch
C$ 7,596
Seller
Fashion Ace, Inc
 
US
Omega Seamaster Aqua Terra GMT
Omega Seamaster Aqua Terra GMT
C$ 5,530
Free shipping
Seller
Rocky Mountain Pawn Ltd.
CA
Rolex Datejust
Rolex Datejust
C$ 10,212
Seller
LABELLE JEWELRY
 
US
Omega Constellation Ref. 168.004 18k Gold Vintage
Omega Constellation Ref. 168.004 18k Gold Vintage
C$ 10,087
Free shipping
Seller
Best Deals HD
 
US
Rolex Gmt Master  Ref:16700 Stainless Steel Blue Red Pepsi...
Rolex Gmt Master Ref:16700 Stainless Steel Blue Red Pepsi...
C$ 10,766
Seller
La Jolla Jewelry and Collateral Loan Company
9
US
Rolex Sea Dweller 126600 43MM Red Logo 50th Anniversary Edition
Rolex Sea Dweller 126600 43MM Red Logo 50th Anniversary Edition
C$ 16,812
Seller
Private seller
 
US
Rolex Oyster Perpetual Milgauss 116400 Box & Papers
Top
Rolex Oyster Perpetual Milgauss 116400 Box & Papers
C$ 7,720
Seller
Phigora
63
US
Rolex Oyster Perpetual Datejust
Rolex Oyster Perpetual Datejust
C$ 8,655
Seller
WatchUWant.com
49
US
Breitling Avenger II GMT A3239011.BC35.170A
Top
Breitling Avenger II GMT A3239011.BC35.170A
C$ 4,394
Seller
Uhren2000 GmbH
206
DE
Rolex 41 Mm In Solid 18kt Rose Gold Diamonds
Rolex 41 Mm In Solid 18kt Rose Gold Diamonds
C$ 74,717
Seller
Watch My Diamonds
38
US
Panerai Luminor Sealand Purdey PAM 845
Panerai Luminor Sealand Purdey PAM 845
C$ 18,680
Seller
Kronopassion
 
US
Omega Seamaster Professional 300M
Omega Seamaster Professional 300M
C$ 3,000
Seller
Private seller
CA
Rolex Sea-Dweller 126600 Red 43mm Divers Watch Red
Rolex Sea-Dweller 126600 Red 43mm Divers Watch Red
C$ 18,999
Seller
Private seller
 
US
Rolex Seadweller 126600 43MM Ceramic New Model Not in Stores Rare
Rolex Seadweller 126600 43MM Ceramic New Model Not in Stores Rare
C$ 21,164
Seller
The Watch Collector NY
 
US
Zenith El Primero Rainbow bicolour
Zenith El Primero Rainbow bicolour
C$ 4,296
Seller
Private seller
CA
Breitling Super Avenger Chronograph A13370 Box And Papers
Top
Breitling Super Avenger Chronograph A13370 Box And Papers
C$ 4,233
Seller
Phigora
63
US
Panerai Ferrari Scuderia GMT FER 9
Panerai Ferrari Scuderia GMT FER 9
C$ 3,975
Seller
Private seller
CA
Breitling Super Avenger diamond bezel PVD black Steel
Breitling Super Avenger diamond bezel PVD black Steel
C$ 5,495
Seller
Private seller
CA
Breitling Exospace B55 Connected
Breitling Exospace B55 Connected
C$ 9,800
Seller
Private seller
CA
Rolex Day-Date 36 18 kt Everose-Gold 118205 Schoko DIA
Top
Rolex Day-Date 36 18 kt Everose-Gold 118205 Schoko DIA
C$ 38,191
Seller
Uhren2000 GmbH
206
DE
Omega Speedmaster "Dark Side of the Moon" 311.92.44.51...
Omega Speedmaster "Dark Side of the Moon" 311.92.44.51...
C$ 8,655
Free shipping
Seller
Govberg Jewelers
125
US
Girard Perregaux Chrono Hawk
Top
Girard Perregaux Chrono Hawk
C$ 7,908
Seller
Private seller
CA
Rolex Oyster Perpetual Datejust Ref: 16200 Stainless Steel...
Rolex Oyster Perpetual Datejust Ref: 16200 Stainless Steel...
C$ 5,062
Seller
La Jolla Jewelry and Collateral Loan Company
9
US
Rolex 1680 Submariner 1680 TIFFANY & CO SS / Bracelet (26025)
Rolex 1680 Submariner 1680 TIFFANY & CO SS / Bracelet (26025)
C$ 40,472
Seller
European Watch Company
50
US
IWC Portofino IW391010 Chronograph Automatic Box & Papers
Top
IWC Portofino IW391010 Chronograph Automatic Box & Papers
C$ 6,599
Seller
Phigora
63
US
Omega Seamaster Planet Ocean
Top
Omega Seamaster Planet Ocean
C$ 4,047
Seller
Private seller
 
US
Breitling Chronomat B01 HB0110
Breitling Chronomat B01 HB0110
C$ 29,354
Seller
Luxury Bazaar
31
US
Panerai Luminor 1950
Panerai Luminor 1950
C$ 16,183
Seller
WatchUWant.com
49
US
Breitling SuperOcean Heritage 46
Breitling SuperOcean Heritage 46
C$ 3,549
Seller
BernardWatch.com
119
US
Panerai Luminor Marina PAM 00001 A Series T Swiss T Dial
Panerai Luminor Marina PAM 00001 A Series T Swiss T Dial
C$ 21,793
Seller
Kronopassion
 
US
Rolex 116660Sea-Dweller DEEPSEA Stainless Steel&Ceramic...
Rolex 116660Sea-Dweller DEEPSEA Stainless Steel&Ceramic...
C$ 16,125
Seller
Watch My Diamonds
38
US
Rolex Oyster Perpetual Datejust Ref: 1601 Steel White Gold...
Rolex Oyster Perpetual Datejust Ref: 1601 Steel White Gold...
C$ 4,726
Seller
La Jolla Jewelry and Collateral Loan Company
9
US
Rolex 16622 Yacht Master SS Platinum Bezel (26307)
Rolex 16622 Yacht Master SS Platinum Bezel (26307)
C$ 13,947
Seller
European Watch Company
50
US
Omega Speedmaster Chronograph 3211.3000 W/ Card
Top
Omega Speedmaster Chronograph 3211.3000 W/ Card
C$ 3,361
Seller
Phigora
63
US
Breitling Chronomat Evolution
Top
Breitling Chronomat Evolution
C$ 7,721
Seller
Private seller
 
US
Omega Deville Hour Vision Annual Calendar 431.33.41.22.06.001
Omega Deville Hour Vision Annual Calendar 431.33.41.22.06.001
C$ 6,787
Free shipping
Seller
Govberg Jewelers
125
US
Breitling Bentley 6.75
Breitling Bentley 6.75
C$ 4,855
Free shipping
Seller
White Glove Watch Company
 
US
Rolex Day-Date President
Rolex Day-Date President
C$ 14,937
Seller
BernardWatch.com
119
US
Panerai Luminor 1950 PAM 127 E Series Special Editions
Panerai Luminor 1950 PAM 127 E Series Special Editions
C$ 21,793
Seller
Kronopassion
 
US
Ulysse Nardin Marine Diver
Ulysse Nardin Marine Diver
C$ 17,428
Seller
WatchUWant.com
49
US
Omega Seamaster 300 Master Co-axial Stainless Steel Ref:...
Omega Seamaster 300 Master Co-axial Stainless Steel Ref:...
C$ 5,286
Seller
La Jolla Jewelry and Collateral Loan Company
9
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.