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TOP
Omega 123.10.38.21.06.001 CONSTELLATION
Rs. 273,752
Verified Dealer
10
HK
TOP
Omega 424.58.40.20.52.001 DE VILLE
Rs. 964,862
Verified Dealer
10
HK
TOP
IWC Da Vinci Perpetual Calendar Chronograph Rattrapante 3754-003
Rs. 1,106,417
Free shipping
Verified Dealer
179
US
TOP
Ulysse Nardin Marine Chronometer Manufacture
Rs. 355,901
Verified Dealer
AE
TOP
Rolex Datejust Pearlmaster 39, official price 112.000 CHF
Rs. 5,328,160
Verified Dealer
28
CH
Breitling Navitimer 1 Chronograph GMT 46
Rs. 391,371
Verified Dealer
5415
DE
TOP
Chopard L.U.C Pro One Diver black dial 42,5 - TOP CONDITION
Rs. 260,914
Free shipping
Verified Dealer
448
NL
TOP
Chopard Manufacture Caliber Mille Miglia 01.01-C GT XL 8565
Rs. 240,442
Verified Dealer
368
ES
TOP
Breitling CHRONOMAT 44 GMT AUTOMATIC AB042011 unworn 4750ht
Rs. 432,715
Free shipping
Verified Dealer
132
FR
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
Rs. 196,689
Verified Dealer
62
DE
Rolex Daytona Platinum Diamond 40mm Watch 116576TBR
Rs. 11,621,191
Free shipping
Verified Dealer
191
US
Rolex Datejust 41mm Basel Release Blue Roman 2019
Rs. 717,613
Verified Dealer
149
US
Rolex Sea-Dweller
Rs. 617,380
Verified Dealer
 
US
TOP
Hublot Classic Fusion Ultra-Thin 42, official price 11.900 CHF
Rs. 583,843
Verified Dealer
28
CH
Rolex Daytona with ZENITH movement, 1995
Rs. 1,589,567
Verified Dealer
11
DE
Breitling SUPEROCEAN II
Rs. 272,153
Verified Dealer
89
MC
Rolex Datejust Stahl Ref :16233 Rolex Box & Papiere von 2000
Rs. 401,325
Verified Dealer
256
DE
TOP
Breitling NAVITIMER 01 ROSEGOLD RB012012 unworn 12230HT
Rs. 1,115,908
Free shipping
Verified Dealer
132
FR
Breitling Chronomat 44
Rs. 1,846,466
Verified Dealer
 
NL
Rolex Datejust 41mm Stainless Steel Blue Diamond Dial Watch...
Rs. 762,573
Free shipping
Verified Dealer
191
US
Omega Speedmaster Moonwatch Apollo 11 50th Anniversary NEW
Rs. 1,016,788
Verified Dealer
149
US
Rolex Submariner Date
Rs. 695,315
Verified Dealer
 
US
TOP
Rolex Datejust Pearlmaster 34
Rs. 1,459,717
Verified Dealer
28
CH
Rolex Early Day-Date from 1961
Rs. 622,179
Verified Dealer
11
DE
Rolex GMT Master II, Reference 16710, P-Serie, LC 100
Rs. 1,026,796
Verified Dealer
39
DE
Rolex Day-Date 40mm Rose Gold President White Roman Dial
Rs. 2,142,671
Free shipping
Verified Dealer
12
US
TOP
Hublot Big Bang Carbon Bezel Baguette 23650€ HT
Rs. 2,159,562
Free shipping
Verified Dealer
132
FR
Tudor Heritage Black Bay Chronograph Leather 79350
Rs. 301,054
Verified Dealer
746
BE
Rolex Datejust 41 Steel & White Gold Blue Diamond Jubilee ...
Rs. 871,522
Free shipping
Verified Dealer
191
US
Omega Seamaster Diver 300 M
Rs. 225,768
Verified Dealer
10
UK
Rolex Air King
Rs. 359,533
Verified Dealer
 
US
TOP
Chaumet Liens 33, official price 8.580 CHF
Rs. 364,874
Verified Dealer
28
CH
Rolex Day-Date with rare Wide Boy Dial
Rs. 622,179
Verified Dealer
11
DE
Rolex Datejust lady 26 MOP Diamonds NEW
Rs. 919,219
Verified Dealer
1169
NL
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Rs. 195,083
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89
MC
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Rs. 2,287,936
Verified Dealer
344
US
Rolex GMT-Master Vintage UAE Air Force 1675
Rs. 8,596,380
Free shipping
Verified Dealer
415
UK
Rolex Datejust 41 Steel & White Gold Black Diamond Jubilee 126334
Rs. 798,889
Free shipping
Verified Dealer
191
US
Omega Seamaster Diver 300 M
Rs. 215,814
Verified Dealer
10
UK
Breitling Chronomat 44 GMT
Rs. 256,900
Verified Dealer
10
DE
TOP
Rolex Lady-Datejust, official price 32.000 CHF
Rs. 1,423,222
Verified Dealer
28
CH
Rolex Early Datejust Turn-O-Graph from 1959
Rs. 461,617
Verified Dealer
11
DE
Rolex Submariner Date Black Ceramic
Rs. 676,369
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1169
NL
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Rs. 497,743
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89
MC
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Rs. 1,663,293
Verified Dealer
344
US
Rolex Submariner Kermit 16610LV
Rs. 2,710,122
Free shipping
Verified Dealer
415
UK
Rolex Datejust 41 Steel Fluted Bezel White Roman Dial 126334
Rs. 711,730
Free shipping
Verified Dealer
191
US
Omega Seamaster Diver 300 M
Rs. 187,763
Verified Dealer
10
UK
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Rs. 2,886,107
Verified Dealer
557
NL
TOP
Tudor Black Bay Bronze
Rs. 255,463
Verified Dealer
28
CH
Omega Constellation with rare honey comb dial
Rs. 301,054
Verified Dealer
11
DE
Omega Speedmaster Steel Gold Green Co-Axial
Rs. 598,094
Verified Dealer
1169
NL
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Rs. 477,673
Free shipping
Verified Dealer
675
DE
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Rs. 2,723,734
Verified Dealer
344
US
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Rs. 1,131,103
Free shipping
Verified Dealer
415
UK
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Rs. 4,140,002
Free shipping
Verified Dealer
191
US
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Rs. 1,023,585
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89
MC
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Rs. 678,376
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557
NL
TOP
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Rs. 1,532,706
Verified Dealer
28
CH
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Rs. 381,335
Verified Dealer
11
DE
Breitling Bentley Motors
Rs. 337,181
Verified Dealer
1169
NL
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Rs. 312,321
Free shipping
Verified Dealer
117
US
Rolex 16570 Explorer II SS Black Dial "Swiss Only" (32744)
Rs. 359,533
Verified Dealer
344
US
Rolex GMT-Master Pepsi 16700
Rs. 950,126
Free shipping
Verified Dealer
415
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.