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Omega Seamaster 300 233.32.41.21.01.001 Very good Steel 41mm Automatic
Omega Seamaster 007 James Bond Spectre Limitiert Automatik...
Rs.739,327
+ Rs.13,835 for shipping
Sold by Chrono24
DE
Omega Seamaster Aqua Terra 22012382003001 Unworn Steel 38mm Automatic India, Goa
Omega Seamaster Aquaterra Co Axial Master 38mm
Rs.348,351
Excl. shipping
Private Seller
IN
Rolex Oyster Perpetual Date 1500 Good Steel 34mm Automatic India, Mumbai
Rolex Oyster Perpetual Date Superlative Chronometer Officially...
Rs.214,000
Free shipping
Professional dealer
4.82 (10)
IN
Tissot PRC 200 T0554171105700 Good Steel 42mm Quartz India, Nagercoil
Tissot PRC 200
Rs.26,524
Excl. shipping
Private Seller
IN
Omega Constellation 2652-5 SC Good Steel 35mm Automatic India, MUMBAI
Omega Constellation Automatic Chronometer Officially Certified...
Rs.98,000
+ Rs.600 for shipping
Professional dealer
4.85 (113)
IN
Seiko Coutura V194-0AB0 Good Steel 45mm Quartz India, Mumbai
Seiko Coutura Solar Quartz Chronograph Date Steel Mens Watch
Rs.18,990
+ Rs.1,907 for shipping
Professional dealer
4.79 (72)
IN
Rolex GMT-Master II 126710BLRO Very good Steel 40mm Automatic
Rolex GMT-Master II "MK1" 2018 Model Excellent Condition
Rs.1,967,965
+ Rs.8,561 for shipping
Professional dealer
4.96 (55)
UK
Chopard L.U.C 168561-3001 New Steel 43mm Automatic
Chopard L.U.C Perpetual Twin
Rs.1,372,798
+ Rs.7,627 for shipping
Professional dealer
4.94 (201)
US
Rolex GMT-Master 1675 Good Steel 40mm Automatic
Rolex GMT-Master Pepsi 1675 Mark 3 Radial Dial Jubilee Serial...
Rs.2,677,057
+ Rs.61,740 for shipping
Professional dealer
4.94 (147)
DE
Omega Seamaster Aqua Terra 220.13.41.21.03.001 Very good Steel 41mm Automatic
Omega Seamaster Aqua Terra 150M Co-Axial Automatik 220.10.41.2...
Rs.341,561
+ Rs.7,782 for shipping
Sold by Chrono24
DE
Omega Seamaster Diver 300 M 210.30.42.20.03.001 New Steel 42mm Automatic
Omega Seamaster Diver 300 M NEW 2021
Rs.423,708
+ Rs.7,696 for shipping
Professional dealer
4.85 (63)
IT
Omega Constellation Good Steel 35mm Automatic India, Mumbai
Omega Constellation Chronometer Automatic
Rs.120,000
Free shipping
Professional dealer
4.82 (10)
IN
Omega Constellation 368.1201 Very good Steel Automatic India, Hyderabad
Omega Constellation chronometer automatic
Rs.145,000
Excl. shipping
Private Seller
IN
Rolex Datejust 41 126334 New Steel 41mm Automatic
Rolex Datejust 41 | NEW 2021
Rs.1,141,418
+ Rs.12,884 for shipping
Professional dealer
4.89 (22)
NL
Rolex GMT-Master 16750 Good Steel 40mm Automatic
Rolex GMT-Master II "Pepsi"
Rs.1,457,037
+ Rs.12,971 for shipping
Professional dealer
4.89 (36)
DE
Rolex Sea-Dweller Deepsea 126660 Unworn Steel 44mm Automatic
Rolex Sea-Dweller Deepsea 2021 Complete Set UNWORN
Rs.1,324,093
+ Rs.8,561 for shipping
Professional dealer
4.96 (55)
UK
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date | LC100 | NEU | 2021 | FullSet
Rs.1,478,655
+ Rs.25,941 for shipping
Professional dealer
4.96 (245)
DE
Rolex Daytona 116520 Very good Steel 40mm Automatic
Rolex Daytona Citrus Lemon Dial Super Rare LC100 Collectors...
Rs.15,564,789
+ Rs.205,801 for shipping
Professional dealer
4.94 (147)
DE
Omega Speedmaster Broad Arrow 321.30.44.50.01.001 Very good Steel 44mm Automatic
Omega Speedmaster Legend Michael Schumacher Chronograph Ref....
Rs.384,796
+ Rs.7,782 for shipping
Sold by Chrono24
DE
Omega Seamaster Planet Ocean 2201.50.00 Very good Steel 42mm Automatic
Omega Seamaster Planet Ocean Full Set
Rs.345,884
+ Rs.7,696 for shipping
Professional dealer
4.85 (63)
IT
Omega Constellation 14902 62 SC Fair Steel 34mm Automatic India, Mumbai
Omega Automatic Chronometer Constellation Pie Pan Ref No....
Rs.130,000
Free shipping
Professional dealer
4.82 (10)
IN
Omega Speedmaster Professional Moonwatch Moonphase 304.23.44.52.13.001 Very good Gold/Steel 44.25mm Automatic India, NEW DELHI
Omega Speedmaster Professional Moonwatch Moonphase
Rs.764,308
Excl. shipping
Private Seller
IN
Rolex Submariner (No Date) 124060 New Steel 41mm Automatic
Rolex Submariner NO Date NEW 2021
Rs.1,253,830
+ Rs.8,647 for shipping
Professional dealer
4.80 (86)
CH
Rolex Yacht-Master 68623 Good Steel 34mm Automatic
Rolex Yacht Master Oyster Perpetual Date
Rs.773,916
+ Rs.12,971 for shipping
Professional dealer
4.89 (36)
DE
Rolex Yacht-Master 37 268622 Very good Steel 37mm Automatic
Rolex Yacht-Master 37 2019 Model Mint
Rs.1,064,467
+ Rs.8,561 for shipping
Professional dealer
4.96 (55)
UK
Rolex Datejust 41 126334 Unworn Steel 41mm Automatic
Rolex Datejust 41 | Ungetragen | 09/2021 | FullSet | Rhodium
Rs.1,150,065
+ Rs.25,941 for shipping
Professional dealer
4.96 (245)
DE
Rolex Daytona 16528 Very good Yellow gold 40mm Automatic
Rolex Daytona U Series LC100 FULL SET AMAZING MINT CONDITION...
Rs.5,879,599
+ Rs.102,901 for shipping
Professional dealer
4.94 (147)
DE
Omega Speedmaster Professional Moonwatch 311.30.44.51.01.002 Very good Steel 44mm Automatic
Omega Speedmaster Moonwatch Chronograph Automatik Ref....
Rs.514,503
+ Rs.13,835 for shipping
Sold by Chrono24
DE
Tudor Black Bay Chrono M79360N-0002 New Steel 41mm Automatic
Tudor Black Bay Chrono NEW
Rs.544,768
+ Rs.7,696 for shipping
Professional dealer
4.85 (63)
IT
Rolex Datejust 41 126334 Very good Steel 41mm Automatic
Rolex Datejust 41
Rs.1,211,723
+ Rs.7,550 for shipping
Professional dealer
US

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.