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Rolex Datejust Pearlmaster
TOP
Rolex Datejust Pearlmaster
AU$ 33,886
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Rolex Datejust Pearlmaster
TOP
Rolex Datejust Pearlmaster
AU$ 111,066
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Doxa GRANDE METRE BLUE PLANET LIMITED EDITION 800PCS WORLD
TOP
Doxa GRANDE METRE BLUE PLANET LIMITED EDITION 800PCS WORLD
AU$ 4,825
Free shipping
Seller
Przedsiębiorstwo Handlowe Usługowe
172
PL
Rolex Lady-Datejust
TOP
Rolex Lady-Datejust
AU$ 22,609
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
AU$ 9,852
Seller
Private Seller
 
AU
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
TOP
Rolex GMT-Master II 116759SARU june 2020 Rolex warranty
AU$ 110,179
Seller
MMC RIVIERA
6
MC
Rolex OYSTER PERPETUAL CHRONOMETER 18K GOLD HONEYCOMB WABENBLATT
TOP
Rolex OYSTER PERPETUAL CHRONOMETER 18K GOLD HONEYCOMB WABENBLATT
AU$ 7,968
Seller
Timeless Watches GmbH
271
DE
Rolex Datejust Pearlmaster
TOP
Rolex Datejust Pearlmaster
AU$ 31,905
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Rolex Datejust II Collector Estate Watch
TOP
Rolex Datejust II Collector Estate Watch
AU$ 15,481
Seller
Private Seller
AU
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
AU$ 4,999
Seller
Watchpartners
AU
Omega Seamaster Aqua Terra 150M Master Co-Axial  | 41MM
TOP
Omega Seamaster Aqua Terra 150M Master Co-Axial | 41MM
AU$ 6,600
Seller
Juwelier van Willegen
64
NL
Rado 56-H Chronometre, 1st Version, Very Rare
TOP
Rado 56-H Chronometre, 1st Version, Very Rare
AU$ 10,965
Seller
Plus Ultra AG
5
CH
Rolex Oyster Perpetual Caramel Dial Yellow Gold - 67488
TOP
Rolex Oyster Perpetual Caramel Dial Yellow Gold - 67488
AU$ 8,224
Free shipping
Seller
Pawndeluxe
225
NL
Breitling CHRONOMAT 44 GMT AUTOMATIC AB042011
TOP
Breitling CHRONOMAT 44 GMT AUTOMATIC AB042011
AU$ 9,150
Free shipping
Seller
RIVIERAWATCH
103
FR
Tissot Ballade Powermatic 80 COSC
Tissot Ballade Powermatic 80 COSC
AU$ 900
Seller
Private Seller
 
AU
Rolex GMT-Master II 116758SARU with 2 years warranty
TOP
Rolex GMT-Master II 116758SARU with 2 years warranty
AU$ 110,179
Seller
MMC RIVIERA
6
MC
Rolex Lady-Datejust Pearlmaster
TOP
Rolex Lady-Datejust Pearlmaster
AU$ 31,056
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Breitling Chronomat Windrider MOP Dial A13352
Breitling Chronomat Windrider MOP Dial A13352
AU$ 3,750
Seller
The Watch Culture
AU
Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
AU$ 4,999
Seller
Watchpartners
AU
Sinn 103 St Sa RB Classic Watch Sondermodell
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
AU$ 3,912
Seller
Classic Watch
28
DE
Omega Seamaster Diver 300 M
Omega Seamaster Diver 300 M
AU$ 3,724
Seller
Private Seller
 
AU
Hentschel H1 Chronometer White Gold / Steel, 39.5mm German...
Hentschel H1 Chronometer White Gold / Steel, 39.5mm German...
AU$ 9,150
Seller
Define Watches
6
AU
Rolex Datejust
Rolex Datejust
AU$ 23,000
Seller
ELITADIAMONDS
 
AU
Rolex GMT-Master II 116758SARU
Rolex GMT-Master II 116758SARU
AU$ 203,730
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
263
UK
Rolex Submariner Date
Rolex Submariner Date
AU$ 8,862
Seller
Juwelier Burger, since 2001
814
NL
Jaquet-Droz Grande Date, limit., no. 87/88
TOP
Jaquet-Droz Grande Date, limit., no. 87/88
AU$ 24,760
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
AU$ 3,600
Seller
The Watch Culture
AU
Omega Seamaster Aqua Terra Annual Calendar, UNGETRAGEN, Ref...
Omega Seamaster Aqua Terra Annual Calendar, UNGETRAGEN, Ref...
AU$ 7,329
Free shipping
Seller
chronopark GmbH
 
DE
Breitling Superocean 44
Breitling Superocean 44
AU$ 4,000
Seller
Private Seller
 
AU
Rolex Explorer
Rolex Explorer
AU$ 7,744
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
356
DE
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
IWC Portuguese Chronograph 41mm IW371445 Ex IW371401
AU$ 9,245
Free shipping
Seller
SORELLE RONCO
995
IT
Krieger M882
Krieger M882
AU$ 700
Seller
Private Seller
 
AU
Rolex Datejust Diamond Watch
Rolex Datejust Diamond Watch
AU$ 23,000
Seller
ELITADIAMONDS
 
AU
Rolex Day-Date 36 President Yellow Gold
Rolex Day-Date 36 President Yellow Gold
AU$ 15,569
Seller
Juwelier Burger, since 2001
814
NL
TAG Heuer Link
TAG Heuer Link
AU$ 2,200
Seller
Private Seller
AU
Chaumet Liens
TOP
Chaumet Liens
AU$ 7,060
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Rolex GMT-Master Vintage UAE Air Force 1675
Rolex GMT-Master Vintage UAE Air Force 1675
AU$ 168,298
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
263
UK
Chopard Mille Miglia
Chopard Mille Miglia
AU$ 6,333
Seller
Private Seller
 
AU
Breitling 47mm Chronomat GMT Limited Edition, 2.000 Stück,...
Breitling 47mm Chronomat GMT Limited Edition, 2.000 Stück,...
AU$ 7,808
Free shipping
Seller
chronopark GmbH
 
DE
Omega Seamaster Co-Axial 600 m
Omega Seamaster Co-Axial 600 m
AU$ 5,589
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
356
DE
Ball for BMW
Ball for BMW
AU$ 2,699
Seller
Private Seller
 
AU
Breitling Galactic 32
Breitling Galactic 32
AU$ 4,645
Seller
Private Seller
 
AU
Omega De Ville Hour Vision
Omega De Ville Hour Vision
AU$ 8,000
Seller
Private Seller
 
AU
Rolex Sea-Dweller
Rolex Sea-Dweller
AU$ 10,299
Seller
Juwelier Burger, since 2001
814
NL
Hublot Big Bang Tutti Frutti
TOP
Hublot Big Bang Tutti Frutti
AU$ 28,226
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Rolex Unworn Daytona 116500LN
Rolex Unworn Daytona 116500LN
AU$ 32,331
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
263
UK
Breitling SUPEROCEAN II 44 Total Blue Diver Pro III Chrono...
Breitling SUPEROCEAN II 44 Total Blue Diver Pro III Chrono...
AU$ 3,944
Free shipping
Seller
SORELLE RONCO
995
IT
Breitling 45mm Avenger II Seawolf Automatik Chronometer, Ref....
Breitling 45mm Avenger II Seawolf Automatik Chronometer, Ref....
AU$ 4,455
Free shipping
Seller
chronopark GmbH
 
DE
Rolex Submariner
Rolex Submariner
AU$ 32,734
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
356
DE
Breitling Avenger II Black Dial Chronograph A1338111-BC33SS
Breitling Avenger II Black Dial Chronograph A1338111-BC33SS
AU$ 6,495
Seller
Zaeger Pty Ltd
AU
Breitling Bentley Flying B
Breitling Bentley Flying B
AU$ 11,018
Seller
Helmut Seidl GmbH
11
DE
Rolex Datejust Turn-O-Graph
Rolex Datejust Turn-O-Graph
AU$ 4,900
Seller
Master Watchmaking P/L
 
AU
Rolex Explorer II White
Rolex Explorer II White
AU$ 7,146
Seller
Juwelier Burger, since 2001
814
NL
Hublot King Power
TOP
Hublot King Power
AU$ 23,345
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Rolex Cosmograph Daytona 116520
Rolex Cosmograph Daytona 116520
AU$ 35,343
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
263
UK
Baume & Mercier Shelby Cobra Capeland Chrono  1963 Black &...
Baume & Mercier Shelby Cobra Capeland Chrono 1963 Black &...
AU$ 5,669
Free shipping
Seller
SORELLE RONCO
995
IT
Panerai 47mm Radiomir 1940 3 Days, UNGETRAGEN, B&P, Referenz...
Panerai 47mm Radiomir 1940 3 Days, UNGETRAGEN, B&P, Referenz...
AU$ 7,968
Free shipping
Seller
chronopark GmbH
 
DE
Breitling Avenger  Seawolf
Breitling Avenger Seawolf
AU$ 3,593
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
356
DE
Omega De Ville Co-Axil Chronoscope Stainless Steel 4850.50.31
Omega De Ville Co-Axil Chronoscope Stainless Steel 4850.50.31
AU$ 4,995
Seller
Zaeger Pty Ltd
AU
Breitling Chronomat Evolution
Breitling Chronomat Evolution
AU$ 7,186
Seller
Helmut Seidl GmbH
11
DE
Rolex Lady-Datejust
Rolex Lady-Datejust
AU$ 9,450
Seller
Master Watchmaking P/L
 
AU
Rolex Daytona Gold/Steel Zenith A Serie
Rolex Daytona Gold/Steel Zenith A Serie
AU$ 16,766
Seller
Juwelier Burger, since 2001
814
NL
Tiffany Atlas 42
TOP
Tiffany Atlas 42
AU$ 4,952
Free shipping
Seller
Chronometrie Stäuble AG
 
CH
Rolex Explorer II Steve McQueen 1655
Rolex Explorer II Steve McQueen 1655
AU$ 35,343
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
263
UK
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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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