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Zenith Defy El Primero 95.9002.9004/78.R584 New Titanium 44MMmm Automatic
TOP
Zenith Defy El Primero 21 TITANIUM BLUE NEW
Rs. 760,694
Professional dealer
15
AE
Rolex Submariner Date 126610LN Unworn Steel 41mm Automatic
TOP
Rolex Submariner Date 41mm Reference #: 126610LN
Rs. 1,197,884
Professional dealer
89
US
Rolex Explorer 114270 Very good Steel 36mm Automatic
TOP
Rolex Explorer I Black Dial Steel 36MM "F Series" "2004"
Rs. 552,027
Free shipping
Professional dealer
993
JP
Rolex GMT-Master II 116710BLNR Very good Steel 40mm Automatic
TOP
Rolex GMT-Master II "Batman" Black Dial Ceramic Bezel Steel...
Rs. 1,367,647
Free shipping
Professional dealer
993
JP
Jaeger-LeCoultre Master Chronograph 35121 Very good Steel 40mm Automatic India, Mumbai
Jaeger-LeCoultre Master Chronograph Aston Martin
Rs. 550,000
Private Seller
IN
Certina DS Podium C034.654.44.087.00 Very good Titanium 42mm Quartz India, Bangalore
Certina DS Podium Titanium GMT Chronograph
Rs. 38,000
Private Seller
IN
Panerai Luminor Chrono PAM 00188 Unworn Steel Automatic India, Bangalore
Panerai Luminor Chrono Daylight (Mint Condition Unused)
Rs. 500,000
Private Seller
IN
Omega Seamaster Diver 300 M 2594.52.00 Very good Steel Automatic India, Hyderabad
Omega Seamaster Diver 300 M
Rs. 279,000
Private Seller
IN
Rolex Submariner Date 16610T Very good Steel 40mm Automatic
Rolex Submariner Date Automatik Edelstahl Herrenuhr Oyster...
Rs. 794,555

Sold by Chrono24

DE
Omega Constellation Ladies 123.20.35.20.58.001 New Gold/Steel 35mm Automatic
TOP
Omega Constellation 123.20.35.20.58.001 CO‑AXIAL 35 MM
Rs. 502,425
Professional dealer
860
US
Omega Speedmaster Racing 326.30.40.50.03.001 Very good Steel 40mm Automatic
TOP
Omega Speedmaster Racing Reference #: 326.30.40.50.03.001
Rs. 305,193
Professional dealer
89
US
Omega Constellation 168.005 Fair Gold/Steel 34.0mm Automatic
TOP
Omega Constellation Cal. 564
Rs. 124,824
Professional dealer
16
US
Montblanc Sport Unworn Tantalum Automatic India, Pune
Montblanc Sport SOULMAKERS FOR 100 YEARS
Rs. 1,000,000
Private Seller
IN
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust 41 Fluted Jubilee Blue Roman Dial Ref. 126334...
Rs. 988,064
Professional dealer
39
US
Mauboussin 05390 Good Steel 32mm Automatic India, MUMBAI
Mauboussin Fouga Chronograph MOP Diamond Dial Officially...
Rs. 95,000
Professional dealer
104
IN
Montblanc 7139 Very good Rose gold 41mm Automatic India, Pune
Montblanc GMT CHRONOGRAPH AUTOMATIC
Rs. 600,000
Private Seller
IN
Ulysse Nardin A.261 Good Steel 34mm Automatic
TOP
Ulysse Nardin Vintage Chronometer 36000
Rs. 202,954
Professional dealer
31
CH
Omega Seamaster Planet Ocean Chronograph 2210.50.00 Very good Steel 45.5mm Automatic
Omega Seamaster Planet Ocean Chronograph Co-Axial Stahl...
Rs. 298,070

Sold by Chrono24

DE
Chopard Mille Miglia 168459-3037 Very good Steel 44mm Automatic
TOP
Chopard Mille Miglia Gran Turismo Chrono Auto Historic...
Rs. 619,484
Free shipping
Professional dealer
955
NL
Rolex Lady-Datejust 178344 Very good Steel 31mm Automatic
TOP
Rolex Datejust 31 Reference #: 178344
Rs. 751,539
Professional dealer
89
US
Omega Constellation Day-Date 168.029 Good Gold/Steel 35mm Automatic
TOP
Omega Constellation Cal. 751 18K Gold Capped Vintage 1970
Rs. 183,116
Professional dealer
16
US
Rolex Lady-Datejust Pearlmaster 80285 New Rose gold 29mm Automatic
TOP
Rolex Lady-Datejust Pearlmaster, 260 diamonds on bezel and...
Rs. 4,349,016
Professional dealer
58
CH
TAG Heuer 502.907 Good Plastic 62mm
TAG Heuer Stopwatch All Sports Ref: 502.907
Rs. 80,802
Professional dealer
32
PT
Omega Constellation 2652-5 SC Good Steel 35mm Automatic India, MUMBAI
Omega Constellation Automatic Chronometer Officially Certified...
Rs. 98,000
Professional dealer
104
IN
Omega Speedmaster Broad Arrow 3581.30.00 Very good Steel 44mm Automatic India, Bengaluru
Omega Speedmaster Broad Arrow
Rs. 336,636
Private Seller
 
IN
Ulysse Nardin Marine Chronometer 41mm 263-66 Very good Steel 41mm Automatic
TOP
Ulysse Nardin Marine Chronometer 41 mm
Rs. 285,792
Professional dealer
31
CH
Omega De Ville Prestige 4500.31.00 Very good Steel 34.5mm Automatic
Omega De Ville Prestige Chronometer Automatik Stahl Herrenuhr...
Rs. 139,159

Sold by Chrono24

DE
Omega Constellation 2852-4 SC Good Gold/Steel 35mm Automatic India, MUMBAI
Omega Automatic Chronometer Officially Certified Constellation.
Rs. 87,743
Free shipping
Professional dealer
75
IN
Omega Speedmaster Professional Moonwatch 31032425001001 Unworn Steel 42mm Manual winding
Omega Speedmaster Moonwatch 42mm NEW 2021 Ref. 31032425001001
Rs. 556,638
Professional dealer
155
IT
Rolex Submariner Date 116610LV Very good Steel 40mm Automatic
Rolex Submariner 'Hulk'
Rs. 1,836,684
Professional dealer
14
UK
Rolex Datejust 116188 New Yellow gold 36mm Automatic
TOP
Rolex Datejust, new, bezel with 60 diamonds, dial with 10...
Rs. 1,565,232
Professional dealer
58
CH
Omega Constellation 2852 Very good Steel 35mm Automatic
Omega Constellation Ref. 2852 - From 60's - Top Conditions - ...
Rs. 179,561
Professional dealer
24
IT
Omega Constellation Good Steel 33mm Automatic India, MUMBAI
Omega Constellation Automatic Chronometer Officially Certified
Rs. 95,000
Professional dealer
104
IN
Ball DG3030B-S3CJ-BK New Titanium 40mm Automatic
TOP
Ball Roadmaster Marine GMT Ceramic Brown
Rs. 200,110
Free shipping
Professional dealer
151
JP
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex 2021 Datejust 41 Blue Index Dial Jubilee NEW 126334...
Rs. 1,041,091
Professional dealer
570
US
Blancpain Villeret 7002-1127-61 Very good Steel 36mm Manual winding
Blancpain Villeret Extra Slim Chronometer Handaufzug Herrenuhr...
Rs. 435,434

Sold by Chrono24

DE
Omega Constellation Day-Date 168.019 Very good Steel 35mm Automatic India, MUMBAI
Omega Constellation
Rs. 91,558
Free shipping
Professional dealer
75
IN
Omega Speedmaster Professional Moonwatch 31032425001001 Unworn Steel 42mm Manual winding
Omega Speedmaster Moonwatch Double Sapphire 42mm NEW 2020 With...
Rs. 565,616
Professional dealer
155
IT
Rolex GMT-Master II 126710BLNR Very good Steel 40mm Automatic
Rolex GMT-Master II ‘Batman’
Rs. 1,416,870
Professional dealer
14
UK
Rolex Lady-Datejust Pearlmaster 80319 New White gold 29mm Automatic
TOP
Rolex Lady-Datejust Pearlmaster, new, white gold, bezel set...
Rs. 1,739,192
Professional dealer
58
CH
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust Ref.: 126334 – Diamant Zifferblatt – NEU- Full...
Rs. 1,291,938
Professional dealer
211
DE
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Oyster Perpetual Datejust 41 Ref. 126334
Rs. 1,027,984
Professional dealer
319
DE
Ball Engineer Hydrocarbon Nedu DC3026A-S3CJ-BE New Titanium 42mm Automatic
TOP
Ball Engineer Hydrocarbon NEDU
Rs. 310,515
Free shipping
Professional dealer
151
JP
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex 2021 Submariner Date 126610 LN 41MM NEW
Rs. 1,178,428
Professional dealer
570
US
Omega Seamaster Aqua Terra 231.10.42.21.01.004 Very good Steel 41.5mm Automatic
Omega Seamaster Aqua Terra Automatik Stahl 231.10.42.21.01.004...
Rs. 363,610

Sold by Chrono24

DE
Omega Constellation 167.005 Good Gold/Steel 34mm Automatic India, MUMBAI
Omega Pie Pan Constellation.
Rs. 114,448
Free shipping
Professional dealer
75
IN
Zenith CP.-2 Steel Chronograph
Zenith A. Cairelli Tipo CP-2 Mai Lucidato
Rs. 1,005,539
Professional dealer
155
IT
Rolex Sea-Dweller 4000 16600 New Steel 40mm Automatic
Rolex Sea-Dweller 'NOS'
Rs. 1,521,824
Professional dealer
14
UK
Hublot Classic Fusion Ultra-Thin 545.NX.1270.LR New Titanium 42mm Manual winding
TOP
Hublot Classic Fusion ultra-thin, new, 42mm, titanium, manual...
Rs. 658,565
Professional dealer
58
CH
Omega Seamaster 300 234.30.41.21.01.001 New Steel Automatic
TOP
Omega SEAMASTER 300 CO‑AXIAL MASTER CHRONOMETER 234.30.41.21.0...
Rs. 516,835
Professional dealer
85
JP
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust ll 126334/RhodiumDial/Jubilee/LC EU/2018/FULLSET/
Rs. 1,113,275
Professional dealer
15
DE
Ball Engineer Hydrocarbon Nedu DC3026A-SCJ-BK New Titanium 42mm Automatic
TOP
Ball Engineer Hydrocarbon NEDU
Rs. 310,515
Free shipping
Professional dealer
151
JP
Rolex Sea-Dweller 126600 New Steel 43mm Automatic
Rolex Sea-Dweller SD43 126600 NEW 50th Anniversary
Rs. 1,182,243
Professional dealer
570
US
Breitling Chronomat Evolution C13356 Very good Gold/Steel 43mm Automatic
Breitling Chronomat Evolution Chronograph Stahl / Gold...
Rs. 408,500

Sold by Chrono24

DE
Omega Constellation 168.0062 Very good Steel 37mm Automatic India, MUMBAI
Omega Automatic Constellation Chronometer Officially Certified.
Rs. 95,373
Free shipping
Professional dealer
75
IN
Omega Seamaster Diver 300 M 210.30.42.20.03.001 New Steel 42mm Automatic
Omega Seamaster Diver 300 M
Rs. 339,451
Professional dealer
352
US
Rolex Submariner (No Date) 114060 New Steel 40mm Automatic
Rolex Submariner 'NOS' 114060
Rs. 1,206,964
Professional dealer
14
UK
Breguet Reine de Naples GJ24BB8548DDC3 New White gold Automatic
TOP
Breguet Reine de Naples "Secret de la Reine", paved wit 595...
Rs. 4,100,501
Professional dealer
58
CH
Bell & Ross BR 05 BR05C-BL-ST/SST New Steel 42mm Automatic
Bell & Ross Br 05 Chrono Black
Rs. 529,704
Professional dealer
14
FR
Rolex Sea-Dweller 126600 Good Steel 43mm Automatic
Rolex Sea-Dweller
Rs. 1,487,818
Professional dealer
56
US
Ball Engineer Hydrocarbon Deepquest DM3002A-SC-BK New Titanium 42mm Automatic
TOP
Ball Engineer Hydrocarbon DeepQUEST II
Rs. 262,213
Free shipping
Professional dealer
151
JP
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex 2021 Datejust 41 Slate / Rhodium Dial Jubilee NEW 126334...
Rs. 1,029,646
Professional dealer
570
US
Omega Seamaster Diver 300 M 212.92.44.50.99.001 Very good Ceramic 44mm Automatic
Omega Seamaster Diver ETNZ Chronograph Titan 212.92.44.50.99.0...
Rs. 444,412

Sold by Chrono24

DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Oyster Perpetual Datejust 41 Ref. 126334
Rs. 1,054,918
Professional dealer
319
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.