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Breitling Chronomat Evolution B13356 Very good Gold/Steel 44mm Automatic
TOP
Breitling Chronomat Evolution Blue B13356 Men Watch 18k Two...
AU$ 5,664
Free shipping
Verified Dealer
229
US
Breitling Chronomat Evolution C13356 Very good Gold/Steel 44mm Automatic
TOP
Breitling Chronomat Evolution Factory Diamond Bezel Roman Dial...
AU$ 10,989
Free shipping
Verified Dealer
229
US
Ball Engineer Hydrocarbon DG2018C-S10C-BK New Steel 42mm Automatic
TOP
Ball Engineer Hydrocarbon AeroGMT II 42mm
AU$ 5,357
Verified Dealer
42
NL
Eberhard & Co. Tazio Nuvolari Eberhard & Co Tazio Nuvolari 31030 Movimento Gravè Oro Unworn Steel Automatic
TOP
Eberhard & Co. [Rare] Tazio Nuvolari 31030-MI Gravè Gold
AU$ 19,878
Verified Dealer
 
IT
Omega Seamaster Diver 300 M 210.22.42.20.01.002 Unworn Gold/Steel 42mm Automatic
Omega Seamaster 210.22.42.20.01.002
AU$ 7,087
Verified Dealer
2066
MC
Rolex Datejust 178288 New Yellow gold 31mm Automatic
TOP
Rolex Datejust 31, new, closing down sale - off. pr.: 37.700 CHF
AU$ 36,769
Verified Dealer
30
CH
Omega Speedmaster 310.20.42.50.01.001 New Steel 42mm Manual winding
Omega Speedmaster Apollo 11 50th Anniversary 310.20.42.50.01.001
AU$ 18,438
Free shipping
Verified Dealer
44
US
Rolex Day-Date Oysterquartz 19018 Good Yellow gold 36mm Quartz
Rolex Oysterquarz Daydate
AU$ 11,867
Free shipping
Verified Dealer
DE
Rolex Submariner Date 1680 Very good Steel 40mm Automatic
Rolex 1680 Submariner 1680 SS BOX & PAPERS Circa 1974 (33574)
AU$ 24,928
Verified Dealer
396
US
Omega Speedmaster Professional Moonwatch Moonphase 304.23.44.52.06.001 Unworn Gold/Steel Automatic
Omega Speedmaster Professional Moonwatch Moonphase
AU$ 14,010
Verified Dealer
72
CZ
Omega Constellation Ladies 123.20.35.20.52.003 Good Gold/Steel Australia, sydney
Omega Constellation Ladies
AU$ 5,500
Verified Dealer
 
AU
Rolex Day-Date Very good White gold Automatic
Rolex Day Date White Gold, Blue Diamond Stella Dial, Ref. 18039
AU$ 73,745
Verified Dealer
97
US
Rolex Sea-Dweller Deepsea 116660 Very good Steel 44mm Automatic
Rolex Deepsea Sea-Dweller 116660
AU$ 22,698
Free shipping
Verified Dealer
458
UK
Omega De Ville Prestige Unworn Steel 39.5mm Automatic
Omega De Ville Prestige Co-Axial 39.5 424.13.40.20.06.001
AU$ 4,204
Free shipping
Verified Dealer
452
US
Breguet Classique 5140BB/29/9W6 New White gold 40mm Automatic
TOP
Breguet Classique 40, new, closing down sale - off. pr. 19.400...
AU$ 17,258
Verified Dealer
30
CH
Rolex Oyster Perpetual 26 176200 Very good Steel 26mm Automatic
Rolex : Ladies Oyster Perpetual : 176200 : Stainless Steel :...
AU$ 4,403
Verified Dealer
456
US
Omega Seamaster Planet Ocean 232.30.38.20.04.001 Very good Steel 38mm Automatic
Omega シーマスター 600 プラネットオーシャン コーアクシャル ボーイズ 232.30.38.20.04.001
AU$ 4,476
Free shipping
Verified Dealer
360
JP
Rolex Datejust 126200 Very good Steel 36mm Automatic
Rolex 126200 Datejust Blue Stick Dial / Jubilee Bracelet (33505)
AU$ 10,694
Verified Dealer
396
US
Omega De Ville Prestige 424.13.40.20.03.001 Unworn Steel 39.5mm Automatic
Omega De Ville Prestige
AU$ 3,461
Verified Dealer
72
CZ
Omega De Ville Prestige 424.55.33.20.55.004 Very good Rose gold Automatic Australia, sydney
Omega De Ville Prestige 424.55.33.20.55.004
AU$ 18,000
Verified Dealer
 
AU
Breitling Superocean Héritage II 42 AB2010121B1S1 New Steel 42mm Automatic
Breitling Superocean Héritage II B20 Automatic 42 Stahl-schwarz
AU$ 5,357
Verified Dealer
2652
DE
Breitling Navitimer 1 B01 Chronograph 43 AB01211B1B1A1 New Steel 43mm Automatic
Breitling NAVITIMER 1 B01 CHRONOGRAPH 43 SWISSAIR EDITIONS
AU$ 10,425
Verified Dealer
211
IT
Omega Speedmaster Broad Arrow 3581.30.00 Very good Steel 44.2mm Automatic
Omega Speedmaster Broad Arrow Co-axial Gmt Mens Watch 3581.30.00
AU$ 6,770
Free shipping
Verified Dealer
329
US
Hublot Classic Fusion Ultra-Thin 545.NX.1270.LR New Titanium 42mm Manual winding
TOP
Hublot Classic Fusion Ultra-Thin 42, new, sellout, o.p.:...
AU$ 10,504
Verified Dealer
30
CH
Rolex Datejust 1601 Very good Yellow gold 36mm Automatic
Rolex DATEJUST 1601 18K YELLOW GOLD 1969
AU$ 9,065
Free shipping
Verified Dealer
56
DE
Omega Seamaster Diver 300 M 212.30.36.20.01.002 Good Steel 36mm Automatic
Omega シーマスター プロフェッショナル 300 コーアクシャル ボーイズ 212.30.36.20.01.002
AU$ 3,044
Free shipping
Verified Dealer
360
JP
Longines Record L28214566 New Steel 40mm Automatic
Longines Record Chronometer Automatik L2.821.4.56.6 NEU
AU$ 1,961
Verified Dealer
85
DE
Panerai Luminor Marina Automatic PAM 00164 Very good Steel 44mm Automatic
Panerai Luminor Marina Automatic Full Set 2013 PAM 00164
AU$ 7,335
Verified Dealer
DE
Rolex Daytona 116519G Good White gold 40mm Automatic
Rolex Daytona Rubellite Dial Diamond White Gold 40MM "K Series"
AU$ 49,273
Verified Dealer
203
JP
Breitling Bentley B04 GMT EB043335/BD78 Unworn Titanium 49mm Automatic
Breitling Bentley GMT Light Body B04 Chrono Titan
AU$ 10,537
Verified Dealer
269
DE
Ulysse Nardin Marine Chronometer Manufacture 1183-126-3/43 New Steel 43mm Automatic Australia, Melbourne
Ulysse Nardin Marine Chronometer 43 mm
AU$ 12,213
Free shipping
Verified Dealer
25
AU
Omega De Ville Prestige 424.10.37.20.01.001 New Steel 36.8mm Automatic
Omega De Ville Prestige Co‑Axial 36.8 mm Automatic Black Dial...
AU$ 4,055
Free shipping
Verified Dealer
1567
US
Chaumet Liens W23871-02A New Rose gold 33mm Automatic
TOP
Chaumet Liens 33, new, closing down sale, official price:...
AU$ 12,005
Verified Dealer
30
CH
Breitling Navitimer Unworn Steel 38mm Automatic
Breitling Navitimer 1 Automatic 38 a17325211c1p1
AU$ 4,894
Free shipping
Verified Dealer
452
US
Omega Seamaster Diver 300 M 210.22.42.20.01.002 Very good Gold/Steel 42mm Automatic
Omega Seamaster Diver 300 M
AU$ 7,781
Verified Dealer
26
US
Breitling Superocean A17340 Very good Steel 41,5mm Automatic
Breitling Chronometer SuperOcean A17340
AU$ 2,555
Verified Dealer
187
DE
Rolex Datejust 126334 Unworn Steel 41mm Automatic Australia, Sydney
Rolex Datejust
AU$ 17,000
Private Seller
 
AU
Omega De Ville Prestige 424.10.40.20.02.001 New Steel 39.5mm Automatic
Omega De Ville Prestige Co-Axial Silver Dial Steel 39.5MM "New"
AU$ 3,298
Verified Dealer
203
JP
Omega Seamaster Diver 300 M 2253.80.00 Very good Steel 36mm Automatic
Omega Seamaster Professional 2253.80.00 Mid-Size Automatic Watch
AU$ 2,949
Free shipping
Verified Dealer
297
US
Ulysse Nardin Marine 1183-160-3/40 New Steel 39mm Automatic Australia, Melbourne
Ulysse Nardin Marine Chronometer Lady
AU$ 12,213
Free shipping
Verified Dealer
25
AU
Omega Seamaster 300 233.60.41.21.03.001 New 41mm Automatic
Omega Seamaster 300 Master Co‑Axial 41 mm Automatic Blue Dial...
AU$ 12,629
Verified Dealer
498
JP
Rolex Lady-Datejust Pearlmaster 80319 New White gold 29mm Automatic
TOP
Rolex Pearlmaster 29, closing down sale, o.p.: 31000 CHF
AU$ 27,014
Verified Dealer
30
CH
Omega Seamaster Diver 300 M 210.30.42.20.01.001 Very good Steel 42mm Automatic
Omega Seamaster 300M 210.30.42.20.01.001 Watch with Stainless...
AU$ 6,490
Free shipping
Verified Dealer
490
US
Omega Seamaster Aqua Terra New Automatic
Omega 231.12.42.21.01.002 Omega Seamaster Aqua Terra 150m...
AU$ 6,201
Free shipping
Verified Dealer
11
US
Breitling Avenger II Seawolf A1733110-I519-169A New Steel 45mm Automatic
Breitling Avenger II Seawolf A17331101I1A1
AU$ 4,978
Free shipping
Verified Dealer
214
US
Breitling Navitimer GMT AB044121/BD24 Good Steel 48mm Automatic Australia, NORMAN PARK
Breitling Navitimer GMT - 48mm
AU$ 9,209
Private Seller
 
AU
Universal Genève 65979 Very good White gold 21mm Automatic
Universal Genève Manually Wound 18ct White Gold with Diamond...
AU$ 8,882
Verified Dealer
24
UK
Breitling Chronomat B130501 Very good Steel 39mm Automatic
Breitling Chronomat B130501 Mens Watch Box Papers
AU$ 5,161
Free shipping
Verified Dealer
297
US
Breitling A13315351B1X1 New Steel 42mm Automatic Australia, Melbourne
Breitling Premier Chronograph 42 mm
AU$ 6,824
Free shipping
Verified Dealer
25
AU
Omega Seamaster Planet Ocean 232.30.42.21.01.001 New Steel 42mm
Omega Seamaster Planet Ocean 600M Co‑Axial 42 mm Black Dial Steel
AU$ 6,716
Verified Dealer
498
JP
Breguet Classique 5178BR/29/9V6.D000 New Rose gold 38mm Automatic
TOP
Breguet Classique, new, closing downsale - off. price: 26.700 CHF
AU$ 21,010
Verified Dealer
30
CH
Omega Seamaster 2226.80.00 Very good Steel 41mm Automatic
Omega Seamaster 300M 2226.80.00 Watch with Stainless Steel...
AU$ 6,195
Free shipping
Verified Dealer
490
US
Chopard Grand Prix de Monaco Historique 168569-3001 New Titanium 45mm Automatic
Chopard Grand Prix De Monaco Historique Power Control
AU$ 7,316
Verified Dealer
2671
DE
Omega Seamaster Diver 300 M 2598.80.00 Good Steel 42mm Automatic Australia, Glen Waverley Vic.
Omega Seamaster Diver Chrono 300m Blue Waved Dial 2598.80
AU$ 3,600
Verified Dealer
16
AU
Omega Seamaster Aqua Terra 231.10.42.21.03.001 Very good Steel 41.5mm Automatic Australia, SOUTH PERTH
Omega Seamaster Aqua Terra
AU$ 5,679
Private Seller
 
AU
Breitling Windrider Very good Steel 44mm Automatic
Breitling Chronomat Crosswind Stainless Steel Automatic Diamonds
AU$ 5,604
Verified Dealer
US
Ball DG2018C-S5C-BK New Steel 42mm Automatic Australia, Box Hill
Ball Limited Edition AeroGMT II Men Watch DG2018C-S5C-BK
AU$ 3,950
Verified Dealer
7
AU
Chopard L.U.C 168561-3001 New Steel 43mm Automatic Australia, Melbourne
Chopard L.U.C Perpetual Twin
AU$ 28,333
Free shipping
Verified Dealer
25
AU
Omega Speedmaster Racing 326.32.40.50.06.001 New Steel 40mm Automatic
Omega Speedmaster Racing Co‑Axial Chronograph 40 mm Automatic...
AU$ 3,869
Verified Dealer
498
JP
Rolex Lady-Datejust 179138 New Yellow gold 26mm Automatic
TOP
Rolex Lady-Datejust, new, closing down sale - off. pr.: 32.000...
AU$ 29,265
Verified Dealer
30
CH
Rolex Datejust Turn-O-Graph 1625 Good Steel 36mm Automatic Australia, Sydney
Rolex Datejust Turn-O-Graph
AU$ 4,900
Verified Dealer
 
AU
Breitling Navitimer Rattrapante AB031021/BF77/441X/A20BA.1 New Steel 45mm Automatic
Breitling Navitimer 1 B03 Chronograph Rattrapante 45
AU$ 11,866
Verified Dealer
2671
DE
Breitling Chronomat A13352 Good Steel 39mm Automatic Australia, Chadstone  Vic.
Breitling Chronomat Windrider MOP Dial A13352
AU$ 3,750
Verified Dealer
16
AU
Seiko Grand Seiko 6246-9001 Good Gold/Steel 36.5mm Automatic Australia, 7250
Seiko Grand Seiko
AU$ 3,750
Private Seller
 
AU
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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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