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Rolex Day-Date Tridor Masterpiece Meteorite Diamond Dial
TOP
Rolex Day-Date Tridor Masterpiece Meteorite Diamond Dial
AU$ 64,300
Seller
Juwelier Burger, since 2001
572
NL
Rolex Submariner Date Full Diamonds
TOP
Rolex Submariner Date Full Diamonds
AU$ 45,417
Seller
Juwelier Burger, since 2001
572
NL
Rolex Daytona Diamond & Ruby Set 116589SALV
TOP
Rolex Daytona Diamond & Ruby Set 116589SALV
AU$ 157,262
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
144
UK
Breitling Limited Edition Frecce Tricolori Chronomat 44 - 70...
TOP
Breitling Limited Edition Frecce Tricolori Chronomat 44 - 70...
AU$ 5,616
Free shipping
Seller
Pawndeluxe
57
NL
Rolex Submariner Tropical 1680
TOP
Rolex Submariner Tropical 1680
AU$ 54,902
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
144
UK
Breitling SuperOcean II  Abyss Yellow
Breitling SuperOcean II Abyss Yellow
AU$ 3,200
Seller
Topwatch Pty Ltd
AU
Rolex Submariner James Bond No Crown Guards
TOP
Rolex Submariner James Bond No Crown Guards
AU$ 39,882
Seller
Juwelier Burger, since 2001
572
NL
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
AU$ 9,997
Seller
Private Seller
 
AU
Omega Seamaster Planet Ocean
Omega Seamaster Planet Ocean
AU$ 5,628
Seller
Private Seller
AU
Omega Seamaster  Chronometer
Omega Seamaster Chronometer
AU$ 2,605
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
126
DE
Omega Seamaster Planet Ocean
Omega Seamaster Planet Ocean
AU$ 4,188
Seller
Private Seller
AU
Breitling Navitimer World Breitling
Breitling Navitimer World Breitling
AU$ 6,000
Seller
Private Seller
AU
Chopard Mille Miglia Chopard Mille Miglia
Chopard Mille Miglia Chopard Mille Miglia
AU$ 3,250
Seller
Private Seller
 
AU
Omega Seamaster Professional Chronometer Diver 300m 2532.80
Omega Seamaster Professional Chronometer Diver 300m 2532.80
AU$ 2,400
Seller
Private Seller
 
AU
Omega Seamaster Diver 300 M
Omega Seamaster Diver 300 M
AU$ 3,200
Seller
Private Seller
AU
Omega Speedmaster Moonphase Master Co-Axial Chronograph
TOP
Omega Speedmaster Moonphase Master Co-Axial Chronograph
AU$ 10,866
Seller
Juwelier Burger, since 2001
572
NL
Omega De Ville Hour Vision (Blue - Orbis)
Omega De Ville Hour Vision (Blue - Orbis)
AU$ 7,200
Seller
Private Seller
AU
Doxa GRANDE METRE BLUE PLANET LIMITED EDITION 800PCS WORLD
TOP
Doxa GRANDE METRE BLUE PLANET LIMITED EDITION 800PCS WORLD
AU$ 5,035
Free shipping
Seller
Przedsiębiorstwo Handlowe Usługowe
78
PL
Omega Men's Omega Seamaster Professional 300M 2561.80 Blue...
Omega Men's Omega Seamaster Professional 300M 2561.80 Blue...
AU$ 1,990
Seller
Collectors Coins & Jewelry
 
US
Rolex Daytona
Rolex Daytona
AU$ 21,488
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
126
DE
Rolex Day-Date Borke Ref. 18078 Bj.1983 LC100 +Papiere+Brillia...
Rolex Day-Date Borke Ref. 18078 Bj.1983 LC100 +Papiere+Brillia...
AU$ 17,906
Seller
Uhren - Borgardts
 
DE
Omega Seamaster Planet Ocean Chronograph NEU 12/2017 mit Box/Pap.
Omega Seamaster Planet Ocean Chronograph NEU 12/2017 mit Box/Pap.
AU$ 8,058
Seller
Matthias Wohne Uhrmachermeister
6
DE
Montblanc Timewalker
Montblanc Timewalker
AU$ 7,643
Seller
Handelshaus Rheinländer
 
DE
Louis Chevrolet Swiss Watches Chrono-Tour Classic
Louis Chevrolet Swiss Watches Chrono-Tour Classic
AU$ 2,723
Free shipping
Seller
Louis Chevrolet Watch Company SA
 
CH
Rolex Datejust Pearlmaster 34 White Gold Diamond MOP Dial
TOP
Rolex Datejust Pearlmaster 34 White Gold Diamond MOP Dial
AU$ 46,719
Seller
Juwelier Burger, since 2001
572
NL
Rolex Lady-Datejust
Rolex Lady-Datejust
AU$ 19,500
Seller
Private Seller
AU
Sinn 103 St Sa RB Classic Watch Sondermodell
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
AU$ 3,988
Seller
Classic Watch
12
DE
Rolex 2001 Rolex Submariner Date 40mm Black PVD Coated...
Rolex 2001 Rolex Submariner Date 40mm Black PVD Coated...
AU$ 9,322
Seller
Collectors Coins & Jewelry
 
US
Rolex Submariner
Rolex Submariner
AU$ 16,279
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
126
DE
Rolex GMT-Master 1675 LC100 Full Set (Papiere+Rechnung+Besch+Box)
Rolex GMT-Master 1675 LC100 Full Set (Papiere+Rechnung+Besch+Box)
AU$ 35,813
Seller
Uhren - Borgardts
 
DE
Omega Constellation Co-Axial 35mm
Omega Constellation Co-Axial 35mm
AU$ 3,744
Seller
Soprana dal 1910 srl
 
IT
Omega Speedmaster Mark II Co-Axial Chronograph
Omega Speedmaster Mark II Co-Axial Chronograph
AU$ 5,029
Seller
Horology 411
 
US
Louis Chevrolet Swiss Watches Chrono-Tour Fashion
Louis Chevrolet Swiss Watches Chrono-Tour Fashion
AU$ 2,723
Free shipping
Seller
Louis Chevrolet Watch Company SA
 
CH
Chopard Tycoon Two O Ten Chrono
TOP
Chopard Tycoon Two O Ten Chrono
AU$ 5,209
Seller
Juwelier Burger, since 2001
572
NL
Breitling Chrono Cockpit - Diamond Bezel
TOP
Breitling Chrono Cockpit - Diamond Bezel
AU$ 4,100
Seller
Private Seller
AU
Breitling Superocean II Chronograph
Breitling Superocean II Chronograph
AU$ 6,349
Seller
Juwelier Vogl GmbH
 
DE
Rolex 2000 Men's Rolex Sea-Dweller 16600 Stainless 40mm Black...
Rolex 2000 Men's Rolex Sea-Dweller 16600 Stainless 40mm Black...
AU$ 8,388
Seller
Collectors Coins & Jewelry
 
US
Rolex Datejust
Rolex Datejust
AU$ 6,349
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
126
DE
Breitling Super Avenger Black Limitierte Serie Bj.2009
Breitling Super Avenger Black Limitierte Serie Bj.2009
AU$ 4,802
Seller
Uhren - Borgardts
 
DE
Omega Seamaster Aqua Terra 150M Co-Axial 42 mm
Omega Seamaster Aqua Terra 150M Co-Axial 42 mm
AU$ 15,790
Seller
Soprana dal 1910 srl
 
IT
Rolex Date - Under Factory Warranty & Original Papers
Rolex Date - Under Factory Warranty & Original Papers
AU$ 7,931
Seller
Horology 411
 
US
Omega De Ville Hour Vision
Omega De Ville Hour Vision
AU$ 19,534
Seller
Sfera GmbH
 
AT
Omega Grey Side of the Moon Speedmaster UNWORN
Omega Grey Side of the Moon Speedmaster UNWORN
AU$ 12,637
Seller
LBA Exquisite Time Pieces
5
US
Breitling Galactic 32
Breitling Galactic 32
AU$ 4,645
Seller
Private Seller
AU
Louis Chevrolet Swiss Watches LC-01 Classic
Louis Chevrolet Swiss Watches LC-01 Classic
AU$ 1,360
Free shipping
Seller
Louis Chevrolet Watch Company SA
 
CH
Rolex Submariner Date 16613 U Two-Tone Gold Blue Stainless...
Rolex Submariner Date 16613 U Two-Tone Gold Blue Stainless...
AU$ 9,987
Seller
Collectors Coins & Jewelry
 
US
Rolex Yacht Master
Rolex Yacht Master
AU$ 14,651
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
126
DE
Rolex Yachtmaster 35mm Stahl Gold 168623  LC100
Rolex Yachtmaster 35mm Stahl Gold 168623 LC100
AU$ 9,767
Seller
Uhren - Borgardts
 
DE
Omega Speedmaster Day Date
Omega Speedmaster Day Date
AU$ 7,163
Seller
Terzian Garo & Sia OE
 
GR
Hublot Big Bang Carbon Bezel Baguette 24000€ HT
TOP
Hublot Big Bang Carbon Bezel Baguette 24000€ HT
AU$ 46,882
Seller
RIVIERAWATCH
72
FR
Rolex Sea-Dweller
Rolex Sea-Dweller
AU$ 10,515
Seller
A. W. Porter & Son Ltd
 
UK
Breitling Avenger II Seawolf Yellow Black M17331E2/I530 LIMITED
Breitling Avenger II Seawolf Yellow Black M17331E2/I530 LIMITED
AU$ 3,997
Seller
Alux Watches
 
US
Ball Watch for BMW GMT
Ball Watch for BMW GMT
AU$ 3,000
Seller
Private Seller
AU
Louis Chevrolet Swiss Watches Chrono-Tour Sport
Louis Chevrolet Swiss Watches Chrono-Tour Sport
AU$ 2,723
Free shipping
Seller
Louis Chevrolet Watch Company SA
 
CH
Rolex MINT Rolex Submariner Date Hulk 116610 LV Stainless...
Rolex MINT Rolex Submariner Date Hulk 116610 LV Stainless...
AU$ 13,986
Seller
Collectors Coins & Jewelry
 
US
Rolex GMT Master II
Rolex GMT Master II
AU$ 15,953
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
126
DE
Rolex Explorer 2  LC100  Ref.216570
Rolex Explorer 2 LC100 Ref.216570
AU$ 9,279
Seller
Uhren - Borgardts
 
DE
Breitling Superocean 42
Breitling Superocean 42
AU$ 3,256
Seller
Sfera GmbH
 
AT
Omega Speedmaster Professional Moon To Mars
Omega Speedmaster Professional Moon To Mars
AU$ 7,072
Seller
Wrights The Jewellers
 
UK
Omega Seamaster Planet Ocean
Omega Seamaster Planet Ocean
AU$ 5,211
Seller
Martin Wilkinson Ltd
 
UK
Breitling Avenger II GMT Black PVD Steel 43mm M3239010/BF04...
Breitling Avenger II GMT Black PVD Steel 43mm M3239010/BF04...
AU$ 3,797
Seller
Alux Watches
 
US
Breitling Superocean Héritage 46
TOP
Breitling Superocean Héritage 46
AU$ 4,000
Seller
Private Seller
 
AU
Omega Seamaster Planet Ocean
Omega Seamaster Planet Ocean
AU$ 7,249
Seller
Avanti Fine Jewellery
 
UK
Rolex 2017 Rolex Air-King 40mm Green Yellow Black Arabic...
Rolex 2017 Rolex Air-King 40mm Green Yellow Black Arabic...
AU$ 7,723
Seller
Collectors Coins & Jewelry
 
US
Rolex Damenuhr Oyster Datejust
Rolex Damenuhr Oyster Datejust
AU$ 3,256
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
126
DE
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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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