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Rolex Datejust Oysterquartz 17013 Very good Steel 36mm Quartz
TOP
Rolex Oysterquartz Datejust 17013 18k Solid Yellow Gold & SS...
Rs. 409,097
Professional dealer
56
US
Ball DG3030B-S2C-BK New Titanium 40mm Automatic
TOP
Ball DG3030B-S2C-BK Roadmaster Marine GMT LIMITED EDITION Watch
Rs. 193,493
Professional dealer
310
US
Omega Constellation Constellation Manhattan Very good Steel 35mm Automatic
TOP
Omega Constellation Manhattan Vintage 1985 Auto Chronometer...
Rs. 141,081
Professional dealer
56
US
Rolex Oyster Perpetual 124300 Unworn Steel 41mm Automatic India, Mohali
Rolex Oyster Perpetual
Rs. 650,000
Private Seller
IN
Tudor Black Bay 79230R Very good Steel 41mm Automatic India, Jalandhar
Tudor Black Bay
Rs. 223,117
Private Seller
IN
Nautica Good Steel 45mm Quartz India, Gurugram
Nautica A37513
Rs. 12,000
Private Seller
IN
Rolex Datejust 16019 Very good White gold 36mm Automatic
TOP
Rolex Datejust 16019 rare 18K Gold Weissgold White Herrenuhr...
Rs. 5,459,921
Professional dealer
649
DE
Breitling Chronomat Evolution A1335611 Very good Steel 44mm Automatic India, New Delhi
Breitling Chronomat Evolution
Rs. 297,424
Private Seller
IN
Omega De Ville Prestige 424.13.40.20.01.001 Very good Steel 39.5mm Automatic India, Mumbai
Omega De Ville Prestige
Rs. 146,669
Private Seller
IN
Ingersoll Very good 44mm Automatic India, delhi
Ingersoll Chronograph
Rs. 32,500
Private Seller
IN
Omega Speedmaster Professional Moonwatch 310.20.42.50.01.001 Very good Gold/Steel 42mm Manual winding
Omega Speedmaster Moonwatch Apollo 11 50th Anniversairy Ref....
Rs. 1,078,514

Sold by Chrono24

DE
Bremont Supermarine S300/BL/BR New Steel 40mm Automatic
TOP
Bremont Supermarine S300/BL/BR Men's Automatic Blue Dial...
Rs. 319,758
Professional dealer
310
US
Breitling Chronomat 44 AB0110 Very good Steel 44mm Automatic
TOP
Breitling Chronomat 44 Flying Fish Chronograph Ref, AB011010/BB08
Rs. 341,302
Free shipping
Professional dealer
NL
Omega Constellation Day-Date 168.029 Good Yellow gold 35mm Automatic
TOP
Omega Constellation Automatic Chronometer Cal. 751
Rs. 258,843
Professional dealer
63
ES
Mauboussin 05390 Good Steel 32mm Automatic India, MUMBAI
Mauboussin Fouga Chronograph MOP Diamond Dial Officially...
Rs. 95,000
Professional dealer
82
IN
Rolex Yacht-Master II 116688-0002 New Yellow gold 44mm Automatic
Rolex Yacht-Master II Yellow Gold (New Full Set)
Rs. 3,622,580
Free shipping
Professional dealer
11
HK
Omega Constellation omega Fair Steel 36mm Automatic India, Mumbai
Omega Constellation Chronometer Automatic - Cal. 1021 - ca. 1973
Rs. 67,004
Professional dealer
8
IN
Rolex GMT-Master Rolex GMT Master 1675 Pepsi Good Steel 40mm Automatic India, Mumbai
Rolex 1675 GMT Master Pepsi
Rs. 930,612
Professional dealer
 
IN
Omega Seamaster Planet Ocean Chronograph 2210.50.00 Very good Steel 45.5mm Automatic
Omega Seamaster Planet Ocean Chronograph Co-Axial Stahl...
Rs. 332,201

Sold by Chrono24

DE
Ball Engineer Hydrocarbon Nedu DC3026A-S3CJ-BE New Titanium 42mm Automatic
TOP
Ball Engineer Hydrocarbon NEDU
Rs. 280,625
Free shipping
Professional dealer
117
JP
Rolex Day-Date 36 1803 Good Yellow gold 36mm Automatic
Rolex Day-Date 36 Circa 1971
Rs. 1,105,442
Professional dealer
51
UK
Rolex Explorer 114270 Very good Steel 36mm Automatic
Rolex Explorer I 114270 Black (36938)
Rs. 517,420
Professional dealer
676
US
Omega Speedmaster 31020425001001 Steel 42mm Manual winding
Omega 31020425001001 Speedmaster Limited Edition Apollo 11 -...
Rs. 1,158,107
Free shipping
Professional dealer
226
UK
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 41mm Black Dial 2020 New Model (New Full...
Rs. 1,152,159
Free shipping
Professional dealer
11
HK
Rolex Submariner Date 16610T 40mm Automatic
Rolex Submariner
Rs. 810,023
Professional dealer
248
DE
Omega Seamaster Planet Ocean 215.30.44.21.03.001 Very good Steel 43.5mm Automatic
Omega Seamaster Blue Planet Ocean 43.5 MM Men’s Watch 215.30.4...
Rs. 371,873
Professional dealer
8
US
Omega Seamaster Aqua Terra 231.23.44.50.06.001 Very good Gold/Steel 44mm Automatic
Omega Seamaster Aqua Terra 150M Stahl / Gold Automatik Ref....
Rs. 423,214

Sold by Chrono24

DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex U.K. watch 2021 Date-just 41 rhodium full stickers inc...
Rs. 995,372
Professional dealer
 
UK
Ball Engineer Hydrocarbon Nedu DC3026A-SCJ-BK New Titanium 42mm Automatic
TOP
Ball Engineer Hydrocarbon NEDU
Rs. 280,625
Free shipping
Professional dealer
117
JP
Rolex GMT-Master II 126711CHNR Unworn Gold/Steel 40mm Automatic
Rolex GMT-Master II 2020 UNWORN
Rs. 1,632,094
Professional dealer
51
UK
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 41 new
Rs. 1,174,079
Professional dealer
156
ES
Omega Seamaster Diver 300 M 21022422001004 Steel 42mm
Omega 21022422001004 Seamaster Diver 300M - Co-Axial - James...
Rs. 774,178
Free shipping
Professional dealer
226
UK
Omega Seamaster Diver 300 M 210.22.42.20.01.002 New Gold/Steel 42mm Automatic
Omega Seamaster Diver 300M Co-Axial Master Chronometer 42 mm...
Rs. 446,462
Free shipping
Professional dealer
11
HK
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 - WHITE DIAL - NEW 2021
Rs. 1,046,659
Professional dealer
106
DE
Omega Seamaster Diver 300 M 210.22.42.20.01.004 Very good Steel 42mm Automatic
Omega Seamaster Diver 300M 42 MM James Bond 007 LE 210.22.42.2...
Rs. 744,117
Professional dealer
8
US
Omega Seamaster Planet Ocean Chronograph 215.30.46.51.01.002 Very good Steel 45.5mm Automatic
Omega Seamaster Planet Ocean Co-Axial Ref. 215.30.46.51.01.002...
Rs. 514,228

Sold by Chrono24

DE
Rolex Day-Date 18248 Very good Yellow gold 36mm Automatic
Rolex Day-Date President W/h Diamond Bezel
Rs. 1,339,709
Professional dealer
 
US
Ball Engineer Hydrocarbon Spacemaster DM2036A-SCAJ-WH New Steel 41.5mm Automatic
TOP
Ball Engineer Hydrocarbon Spacemaster
Rs. 197,841
Free shipping
Professional dealer
117
JP
Rolex Submariner Date 16610LV Unworn Steel 40mm Automatic
Rolex Submariner Green Bezel NOS Full set RRR
Rs. 1,895,420
Professional dealer
51
UK
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 Wimbledon Jubile NEW
Rs. 1,046,659
Professional dealer
156
ES
Rolex GMT-Master II 126710BLNR Very good Steel 40mm Automatic
Rolex 126710BLNR GMT-Master II Batman Jubilee - 4 Year Rolex...
Rs. 1,553,623
Free shipping
Professional dealer
226
UK
Omega Seamaster Diver 300 M 210.30.42.20.01.001 New Steel 42mm Automatic
Omega Seamaster Diver 300M Co-Axial Master Chronometer 42 mm...
Rs. 355,249
Free shipping
Professional dealer
11
HK
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41 - WIMBLEDON DIAL - NEW 2021
Rs. 1,137,673
Professional dealer
106
DE
Rolex Datejust 126334 Unworn Steel 41mm Automatic
Rolex 126334 Datejust 41 Wimbledon Dial 2020 Stainless Steel
Rs. 1,004,987
Professional dealer
240
US
Rolex Submariner Date 16613T Very good Gold/Steel 40mm Automatic
Rolex Submariner Date Stahl / Gold Automatik Herrenuhr Oyster...
Rs. 805,473

Sold by Chrono24

DE
Rolex Air King 114234 Very good 34mm Automatic
Rolex Air King
Rs. 527,880
Professional dealer
248
DE
Ball Engineer Hydrocarbon DM2276A-S3CJ-BK New Steel 42mm Automatic
TOP
Ball Engineer Hydrocarbon Submarine Warfare Blue PVD
Rs. 185,914
Free shipping
Professional dealer
117
JP
Rolex Sea-Dweller 126603 Very good Gold/Steel 43mm Automatic
Rolex Sea-Dweller 2019 FULL SET
Rs. 1,495,164
Professional dealer
51
UK
Rolex Explorer II 16570 Very good Steel 40mm Automatic
Rolex Explorer II
Rs. 763,645
Free shipping
Professional dealer
743
UK
Rolex Datejust 126334 Steel 41mm Automatic
Rolex 126334 Datejust 41 Wimbledon - Rolex International Warranty
Rs. 1,048,037
Free shipping
Professional dealer
226
UK
Omega Seamaster Diver 300 M 210.62.44.51.01.001 New Rose gold 44mm Automatic
Omega Seamaster Diver 300M Co-Axial Master Chronometer...
Rs. 1,901,063
Free shipping
Professional dealer
11
HK
Rolex Sea-Dweller 126600 Unworn Steel 43mm Automatic
Rolex Sea-Dweller Single Red - TEILVERKLEBT/UNGETRAGEN - 2020...
Rs. 1,319,701
Professional dealer
106
DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex U.K. watch 2021 Date-just 41 full stickers inc barcode...
Rs. 979,572
Professional dealer
 
UK
Chopard Grand Prix de Monaco Historique 158570-3001 Very good Steel 44.5mm Automatic
Chopard Grand Prix de Monaco Historique Chronograph Ref....
Rs. 505,127

Sold by Chrono24

DE
Rolex GMT-Master II 126710BLRO Very good Steel 40mm Automatic
Rolex GMT-Master II - Pepsi - New Condition - B&P - FULLSET -...
Rs. 1,600,934
Professional dealer
196
DE
Ball Engineer II Magneto S NM3022C-N1CJ-BK New Steel 42mm Automatic
TOP
Ball Engineer II Magneto S
Rs. 252,563
Free shipping
Professional dealer
117
JP
Rolex Yacht-Master II 116680 Very good Steel 44mm Automatic
Rolex Yacht-Master II 2015 Mint Condition
Rs. 1,421,433
Professional dealer
51
UK
Rolex GMT-Master Rolex GMT-Master 16750 Very good Steel 40mm Automatic
Rolex Steel GMT-Master Pepsi 16750
Rs. 1,785,349
Free shipping
Professional dealer
743
UK
Laurent Ferrier FBN916.01 Rose gold 40.5mm Manual winding
Laurent Ferrier FBN916.01 Galet Classic Tourbillon - Enamel...
Rs. 7,636,450
Free shipping
Professional dealer
226
UK
Omega Seamaster Aqua Terra 220.10.41.21.03.002 New Steel 41mm Automatic
Omega Aqua Terra 150M Co-Axial Master Chronometer 41MM (New...
Rs. 384,053
Free shipping
Professional dealer
11
HK
Omega Seamaster Diver 300 M 210.30.42.20.01.001 New Steel 42mm Automatic
Omega Seamaster Diver 300 M Black Dial NEW 2021
Rs. 459,620
Professional dealer
106
DE

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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