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Rolex Day-Date Tridor Masterpiece Meteorite Diamond Dial
Top
Rolex Day-Date Tridor Masterpiece Meteorite Diamond Dial
AU$ 59,806
Seller
Juwelier Burger, since 2001
406
NL
Rolex Datejust 28 Everose Diamond President NEW
Top
Rolex Datejust 28 Everose Diamond President NEW
AU$ 40,880
Seller
Juwelier Burger, since 2001
406
NL
Panerai RADIOMIR 1940 3 DAYS GMT PAM570 Limited 300 ex
Top
Panerai RADIOMIR 1940 3 DAYS GMT PAM570 Limited 300 ex
AU$ 33,158
Free shipping
Seller
RIVIERAWATCH
48
FR
Omega Seamaster PloProf 1200M
Top
Omega Seamaster PloProf 1200M
AU$ 8,512
Free shipping
Seller
Rent a Box Schmuck und Uhren AG
 
CH
Omega Seamaster Aqua Terra 150M Co-Axial 34 MM Ref. 231.15.34....
Top
Omega Seamaster Aqua Terra 150M Co-Axial 34 MM Ref. 231.15.34....
AU$ 11,583
Seller
WINGOO WATCHES
184
IT
Longines Master Collection Chronograph Moonphase Calendar
Longines Master Collection Chronograph Moonphase Calendar
AU$ 2,499
Seller
Private seller
AU
Omega De Ville Hour Vision (Blue - Orbis)
Omega De Ville Hour Vision (Blue - Orbis)
AU$ 7,500
Seller
Private seller
AU
Ball Watch for BMW GMT
Ball Watch for BMW GMT
AU$ 3,500
Seller
Private seller
AU
Breitling Chronomat GT (Bi-Colour)
Breitling Chronomat GT (Bi-Colour)
AU$ 3,500
Seller
Private seller
AU
TAG Heuer Carrera Calibre 6 Heritage COSC
Top
TAG Heuer Carrera Calibre 6 Heritage COSC
AU$ 2,800
Seller
Private seller
AU
Porsche Design Dashboard P6612
Top
Porsche Design Dashboard P6612
AU$ 1,900
Seller
Private seller
AU
Omega Seamaster Aqua Terra
Top
Omega Seamaster Aqua Terra
AU$ 12,759
Seller
Private seller
AU
Habring² Jumping Second Calendar enamel dial rose gold appliques
Habring² Jumping Second Calendar enamel dial rose gold appliques
AU$ 8,140
Seller
Define Watches
AU
Breitling Montbrillant Légende A23340
Breitling Montbrillant Légende A23340
AU$ 6,738
Seller
LWG - Luxury Watch Group
 
NL
Breitling SuperOcean II  Abyss Yellow
Breitling SuperOcean II Abyss Yellow
AU$ 3,400
Seller
Topwatch Pty Ltd
AU
Omega ICONIC US Army Ref; 2179 / CK 2179 30t2 Original Full Size
Omega ICONIC US Army Ref; 2179 / CK 2179 30t2 Original Full Size
AU$ 2,670
Seller
Hobart Town Antique Jewellery
AU
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
AU$ 4,435
Free shipping
Seller
Watchpartners
AU
Omega Seamaster Aqua Terra 44mm Chronograph
Omega Seamaster Aqua Terra 44mm Chronograph
AU$ 5,495
Free shipping
Seller
Watch Trader Pty Ltd
AU
Hublot 301.AI.460.RX
Top
Hublot 301.AI.460.RX
price on request
Seller
Deluxe ( Asia ) Ltd
 
HK
Omega Seamaster Planet Ocean 600m Co-Axial Orange Bezel
Omega Seamaster Planet Ocean 600m Co-Axial Orange Bezel
AU$ 4,453
Seller
The Watch Culture
AU
Omega Constellation Ref. 168.004 18k Gold Vintage
Omega Constellation Ref. 168.004 18k Gold Vintage
AU$ 10,335
Seller
Best Deals HD
 
US
Lehmann Intemporal Power Reserve Pointer Date
Lehmann Intemporal Power Reserve Pointer Date
AU$ 17,500
Seller
Define Watches
AU
Rolex GMT II Ceramica art. Rg659
Rolex GMT II Ceramica art. Rg659
AU$ 8,933
Seller
Stroppiana SRL
209
IT
Omega Seamaster 300 Spectre 007 James Bond Limited Edition
Omega Seamaster 300 Spectre 007 James Bond Limited Edition
AU$ 11,191
Seller
Swiss Horology
 
UK
Rolex Rare S/S O/P UAE Air Force Pepsi Bezel GMT-Master...
Rolex Rare S/S O/P UAE Air Force Pepsi Bezel GMT-Master...
AU$ 163,567
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
60
UK
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
Swiss Military Cx Swiss Military 20000 Feet Diving Watch World...
AU$ 4,435
Free shipping
Seller
Watchpartners
AU
Rolex Datejust
Rolex Datejust
AU$ 10,462
Free shipping
Seller
LABELLE JEWELRY
 
US
Bulgari DG42BSCVDCH
Top
Bulgari DG42BSCVDCH
AU$ 7,967
Seller
Deluxe ( Asia ) Ltd
 
HK
Breitling Chronomat Windrider MOP Dial A13352
Breitling Chronomat Windrider MOP Dial A13352
AU$ 3,509
Seller
The Watch Culture
AU
Breitling Chronomat Evolution B13356 18k Gold & Steel
Breitling Chronomat Evolution B13356 18k Gold & Steel
AU$ 5,103
Seller
Best Deals HD
 
US
Lehmann Intemporal Pointer Date
Lehmann Intemporal Pointer Date
AU$ 14,520
Seller
Define Watches
AU
Rolex Date zaffiro art. Rd358nl
Rolex Date zaffiro art. Rd358nl
AU$ 4,239
Seller
Stroppiana SRL
209
IT
Omega Speedmaster Professional Moonwatch Moonphase
Omega Speedmaster Professional Moonwatch Moonphase
AU$ 10,781
Seller
Watch Gallery
 
SE
Ulysse Nardin - Maxi Marine Chronometer Manufacture - 263-66 -...
Auction
Ulysse Nardin - Maxi Marine Chronometer Manufacture - 263-66 -...
AU$ 2,725
Estimated price
Seller
Catawiki BV
 
Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
Swiss Military Cx Swiss Military 20000 Feet Watch World Record...
AU$ 4,435
Free shipping
Seller
Watchpartners
AU
Rolex Datejust
Rolex Datejust
AU$ 10,654
Free shipping
Seller
LABELLE JEWELRY
 
US
Corum 895-931-06-0371-AN92
Top
Corum 895-931-06-0371-AN92
AU$ 8,980
Seller
Deluxe ( Asia ) Ltd
 
HK
Breitling Superocean 42 A1736402 Full Set
Breitling Superocean 42 A1736402 Full Set
price on request
Seller
The Watch Culture
AU
Rolex Oyster Datejust II Jubilee Steel Blue Dial 41 mm (Full Set)
Rolex Oyster Datejust II Jubilee Steel Blue Dial 41 mm (Full Set)
AU$ 9,236
Seller
Kleen Edelmetalen
109
NL
Lehmann Intemporal Power Reserve Window Date Red Gold
Lehmann Intemporal Power Reserve Window Date Red Gold
AU$ 34,090
Seller
Define Watches
AU
Rolex submariner art. Rb639
Rolex submariner art. Rb639
AU$ 7,495
Seller
Stroppiana SRL
209
IT
Rolex Sky Dweller Blue Blau Bleu LAGERND ON STOCK
Rolex Sky Dweller Blue Blau Bleu LAGERND ON STOCK
AU$ 26,496
Seller
LUXUS RITTER GmbH & Co. KG
47
DE
Rolex Oyster Perpetual Datejust Stainless Steel White Gold Watch
Rolex Oyster Perpetual Datejust Stainless Steel White Gold Watch
AU$ 4,778
Seller
La Jolla Jewelry and Collateral Loan Company
9
US
Omega Seamaster Professional 300m Automatic - 41 mm
Omega Seamaster Professional 300m Automatic - 41 mm
AU$ 2,559
Seller
wagener-gold International e.K.
639
DE
Rolex Daytona Cosmograph Stainless steel black
Rolex Daytona Cosmograph Stainless steel black
AU$ 17,412
Seller
Timepiece Bank
202
BE
Ball for BMW Power Reserve
Top
Ball for BMW Power Reserve
AU$ 2,559
Seller
Private seller
 
DE
TAG Heuer Sport Elegance Chronometer Aut.  WG5113
TAG Heuer Sport Elegance Chronometer Aut. WG5113
AU$ 1,263
Seller
The Watch Culture
AU
Rolex Oyster Datejust Turnograph White Gold Bezel Blue Dial 36 mm
Rolex Oyster Datejust Turnograph White Gold Bezel Blue Dial 36 mm
AU$ 7,419
Seller
Kleen Edelmetalen
109
NL
Habring² Felix
Habring² Felix
AU$ 6,680
Seller
Define Watches
AU
Rolex GMT II Ceramica Blu Nero 116710BLNR 07/2015 art. Rg1057
Rolex GMT II Ceramica Blu Nero 116710BLNR 07/2015 art. Rg1057
AU$ 12,567
Seller
Stroppiana SRL
209
IT
Omega Seamaster 300
Omega Seamaster 300
AU$ 6,302
Seller
Watch Gallery
 
SE
Rolex Gmt Master  Ref:16700 Stainless Steel Blue Red Pepsi...
Rolex Gmt Master Ref:16700 Stainless Steel Blue Red Pepsi...
AU$ 11,030
Seller
La Jolla Jewelry and Collateral Loan Company
9
US
Rolex Datejust
Rolex Datejust
AU$ 11,960
Seller
Juwelier Rubin GbR
 
DE
Patek Philippe Perpetual Calendar Ref-5970R-001 18k Rose Gold...
Patek Philippe Perpetual Calendar Ref-5970R-001 18k Rose Gold...
AU$ 180,902
Seller
Bachmann & Scher
 
DE
Omega Seamaster 300 James Bond 007 "SPECTRE" Limited...
Top
Omega Seamaster 300 James Bond 007 "SPECTRE" Limited...
AU$ 10,476
Seller
Private seller
 
CH
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
AU$ 3,305
Seller
The Watch Culture
AU
Omega - Pre Bond / Seamaster automatic chronometer 200 m - Men...
Auction
Omega - Pre Bond / Seamaster automatic chronometer 200 m - Men...
AU$ 1,438
Estimated price
Seller
Catawiki BV
 
Lehmann Intemporal Diamonds Ladies Green
Lehmann Intemporal Diamonds Ladies Green
AU$ 15,395
Seller
Define Watches
AU
Rolex Explorer II scat/gar art. Re352
Rolex Explorer II scat/gar art. Re352
AU$ 6,359
Seller
Stroppiana SRL
209
IT
Omega Speedmaster Professional Moonwatch Moonphase
Omega Speedmaster Professional Moonwatch Moonphase
AU$ 10,781
Seller
Watch Gallery
 
SE
Omega Seamaster Planet Ocean 42mm
Omega Seamaster Planet Ocean 42mm
AU$ 3,935
Seller
Uhrencenter Berlin
178
DE
Omega Seamaster 300  Spectre Limited Edition
Omega Seamaster 300 Spectre Limited Edition
AU$ 10,296
Seller
Watcheclock
35
IT

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.