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Omega 413.20.37.20.08.001 Very good Steel 36.5mm Automatic
TOP
Omega Olympic Collection Beijing 2008 Limited - FULL SET -
Php 153,403
Professional dealer
266
PL
Ulysse Nardin Marine Chronometer 43mm 266-67-3/42 Unworn Rose gold 43mm Chronograph
TOP
Ulysse Nardin Швейцарские Часы Maxi...
Php 760,172
Professional dealer
 
RU
Ulysse Nardin Marine Chronometer 41mm 263-66 Very good Steel 41mm Automatic
TOP
Ulysse Nardin Швейцарские Часы Maxi...
Php 161,843
Professional dealer
 
RU
Rolex Lady-Datejust Pearlmaster 80285 New Rose gold 29mm Automatic
TOP
Rolex Lady-Datejust Pearlmaster, 260 diamonds on bezel and...
Php 2,867,700
Professional dealer
57
CH
Omega De Ville Hour Vision 431-30-41-21-01-001/ Very good 41mm Automatic The Philippines, sta. rosa laguna
Omega de-ville-hour-vision-co-axial-41mm
Php 179,728
Private Seller
PH
Rolex Datejust 16019 Very good White gold 36mm Automatic
TOP
Rolex Datejust 16019 rare 18K Gold Weissgold White Herrenuhr...
Php 3,580,548
Professional dealer
671
DE
Rolex Explorer II 16570T Very good Steel 40mm Automatic
Rolex Explorer II Automatik Herrenuhr Stahl Oyster Perpetual...
Php 482,858

Sold by Chrono24

DE
Omega Good Steel 40mm Automatic
TOP
Omega Seamaster Memomatic Alarm Steel Rare Automatic Watch...
Php 137,272
Professional dealer
195
US
TAG Heuer Grand Carrera CAV5185.FT6020 Very good Titanium 43mm Automatic
TOP
TAG Heuer Grand Carrera 43MM. Top Condition CAV5165 - CAV5185....
Php 229,790
Free shipping
Professional dealer
941
NL
Zenith El Primero 65.0520.4026 Very good White gold 44mm Automatic
TOP
Zenith Grande Class Grande Date Rattrapante, 50 pcs Limited...
Php 570,973
Professional dealer
65
CH
Ulysse Nardin A.261 Good Steel 34mm Automatic
TOP
Ulysse Nardin Vintage Chronometer 36000
Php 133,227
Professional dealer
24
CH
Omega Seamaster Diver 300 M 210.62.42.20.03.001 New Rose gold 42mm Automatic
TOP
Omega Seamaster Diver 300M Co-Axial Master Chronometer 42 mm...
Php 959,751
Free shipping
Professional dealer
16
HK
Breguet Reine de Naples 8967ST/V8/J50 New Steel 43mm Automatic
TOP
Breguet Reine de Naples, new, blue mother-of-pearl dial, blue...
Php 567,711
Professional dealer
57
CH
TAG Heuer Carrera Calibre 8 WAR5010.BA0723 Very good Steel 41mm Automatic The Philippines, Davao City
TAG Heuer Carrera Calibre 8
Php 104,634
Private Seller
PH
Omega De Ville Prestige 424.20.33.20.58.003 Very good Gold/Steel 32.7mm Automatic
TOP
Omega De Ville Prestige Co-Axial Chronometer 18K Yellow Gold &...
Php 269,738
Professional dealer
168
US
Omega Seamaster Diver 300 M 212.30.41.20.03.001 Very good Steel 41mm Automatic
Omega Seamaster Diver 300M Co-Axial Automatik Stahl Ref...
Php 216,062

Sold by Chrono24

DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex 126334 Rolex Datejust 41mm, Blue Dial, Jubilee, Gold...
Php 625,352
Professional dealer
9
CH
Chopard Mille Miglia 168459-3037 Very good Steel 44mm Automatic
TOP
Chopard GT XL first price, historic, LIMITED EDITION 50PCS,...
Php 593,873
Free shipping
Professional dealer
941
NL
Rolex Submariner Date 16610 Very good Steel 40mm Automatic
Rolex Preowned Submariner Date 40mm Stainless Steel Black Dial...
Php 563,508
Professional dealer
112
US
Ulysse Nardin Marine Chronometer 41mm 263-66 Very good Steel 41mm Automatic
TOP
Ulysse Nardin Marine Chronometer 41 mm
Php 187,606
Professional dealer
24
CH
Rolex Daytona 116520 Very good Steel 40mm Automatic
Rolex Daytona 116520 série D 2005
Php 1,432,458
Professional dealer
16
MC
Hublot Classic Fusion Ultra-Thin 545.NX.1270.LR New Titanium 42mm Manual winding
TOP
Hublot Classic Fusion ultra-thin, new, 42mm, titanium, manual...
Php 380,377
Professional dealer
57
CH
TAG Heuer Aquaracer 500M CAK2111BA833 Very good 43mm Automatic The Philippines, Zamboanga city
TAG Heuer Aquaracer Calibre 16
Php 110,000
Private Seller
PH
Rolex Submariner (No Date) 124060 New Steel 41mm Automatic
Rolex Submariner (No Date) | NEU | 2021 | FullSet | Verklebt
Php 787,852
Professional dealer
187
DE
Rolex Datejust 126334 Very good Gold/Steel 41mm Automatic
Rolex Datejust 41 Stahl / Weissgold Herrenuhr Oyster Perpetual...
Php 667,287

Sold by Chrono24

DE
Rolex GMT-Master II 16710 Good Steel 40mm Automatic
Rolex GMT-Master II
Php 596,559
Professional dealer
326
DE
Omega Seamaster Planet Ocean Chronograph 232.32.46.51.01.001 Very good Steel 45.5mm Automatic
TOP
Omega Planet Ocean Deep Sea Diver Orange'' Exhibition Co-Axial...
Php 316,036
Free shipping
Professional dealer
941
NL
Rolex GMT-Master II 16710 Very good Steel 40mm Automatic
Rolex Preowned GMT-Master II 40mm Steel Black & Red 'Coke'...
Php 661,595
Professional dealer
112
US
Rolex Day-Date 36 18039B Very good White gold 36mm Automatic
Rolex Day-Date Tridor
Php 829,632
Professional dealer
21
IT
Rolex Daytona 116528 2000 Very good Yellow gold 40mm Automatic
Rolex Daytona 116528 2000 First series Paul Newman dial
Php 2,148,687
Professional dealer
16
MC
Hublot Classic Fusion Ultra-Thin 515.NX.1270.LR New Titanium 45mm Manual winding
TOP
Hublot Classic Fusion ultra-thin, new, 45mm, titanium, manual...
Php 380,377
Professional dealer
57
CH
Rolex Yacht-Master II 116688-0002 New Yellow gold 44mm Automatic
Rolex Yacht-Master II Yellow Gold (New Full Set)
Php 2,382,328
Free shipping
Professional dealer
16
HK
Rolex Sea-Dweller 126600 New Steel 43mm Automatic
Rolex Sea-Dweller | NEU | 2021 | FullSet | Red
Php 877,381
Professional dealer
187
DE
Omega Seamaster Planet Ocean 2900.50.91 Very good Steel 45mm Automatic
Omega Seamaster Planet Ocean 600M Co-Axial Automatik Stahl...
Php 260,230

Sold by Chrono24

DE
Rolex Submariner Date 116610LN Unworn Steel 40mm Automatic
Rolex Submariner Date full Set incl first owner bill 2018...
Php 814,710
Professional dealer
326
DE
Rolex Sea-Dweller 126600 New Steel 43mm Automatic
Rolex Sea-Dweller
Php 860,455
Professional dealer
105
UK
Rolex Daytona 116523 Very good Gold/Steel 40mm Automatic
Rolex Preowned Daytona 40mm Steel & 18K Yellow Gold White Dial...
Php 926,919
Professional dealer
112
US
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 41mm - NEW APRIL 2021
Php 815,351
Professional dealer
75
UK
Rolex Submariner Date 16610 Very good Steel 40mm Automatic
Rolex Submariner 16610 military NATO 1994 S series
Php 2,089,001
Professional dealer
16
MC
Breguet Reine de Naples 9807ST/5W/J50 New Steel 32.7mm Automatic
TOP
Breguet Reine de Naples, new, white mother-of-pearl dial,...
Php 542,425
Professional dealer
57
CH
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date 41mm Black Dial 2020 New Model (New Full...
Php 789,269
Free shipping
Professional dealer
16
HK
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date | NEU | 03/2021 | FullSet
Php 829,632
Professional dealer
187
DE
Rolex Datejust 126334 Very good Gold/Steel 41mm Automatic
Rolex Datejust 41 Stahl / Weissgold Automatik Herrenuhr Ref....
Php 648,784

Sold by Chrono24

DE
Omega Speedmaster Professional Moonwatch 3194.50.00 Very good Yellow gold 42mm Manual winding
Omega Speedmaster Moonwatch Gold lim 250 from 1992
Php 2,324,760
Professional dealer
326
DE
Rolex Submariner (No Date) 124060-0001 Unworn Steel 41mm Automatic
Rolex Submariner 41mm - New 4/2021 full set
Php 722,198
Professional dealer
202
IT
Rolex GMT-Master II 116719BLRO Very good White gold 40mm Automatic
Rolex Preowned GMT-Master II 40mm 18K White Gold Black Dial...
Php 1,956,829
Professional dealer
112
US
Omega Speedmaster Professional Moonwatch 310.30.42.50.01.001 Unworn Steel 42mm Manual winding
Omega Speedmaster Moonwatch Co-Axial Master Chronometer
Php 399,895
Professional dealer
 
IT
Rolex Daytona 116520 K Very good Steel 40mm Automatic
Rolex Daytona 116520 K Séries 2001 cream
Php 1,545,861
Professional dealer
16
MC
Breitling NB0434E5/BE94 New Carbon 45mm Automatic
TOP
Breitling Bentley GMT, new, chronograph, carbon case and dial,...
Php 666,679
Professional dealer
57
CH
Omega Speedmaster Professional Moonwatch 311.92.44.51.01.005 New Ceramic 44.25mm Automatic
Omega Dark Side Of The Moon Speedmaster Black Moonwatch (New...
Php 505,132
Free shipping
Professional dealer
16
HK
Rolex Sea-Dweller 126600 Very good Steel 43mm
Rolex Sea Dweller
Php 735,650
Professional dealer
15
US
Omega Seamaster Diver 300 M 212.30.44.50.01.001 Very good Steel 44mm Automatic
Omega Seamaster Diver 300M Co-Axial Chronograph 212.30.44.50.0...
Php 247,696

Sold by Chrono24

DE
Rolex Oyster Perpetual Date 15200 Very good Steel 34mm Automatic
Rolex Oyster Perpetual Date 34 mm LC 100 no holes 1995
Php 283,507
Professional dealer
326
DE
Rolex Submariner (No Date) 5513 Very good Steel 40mm Automatic
Rolex Submariner 5513 PRE-COMEX - 1977
Php 1,181,778
Professional dealer
202
IT
Rolex Datejust 16234 Very good Steel 36mm Automatic
Rolex Datejust 36mm Steel Factory Salmon Diamond Dial 18K...
Php 365,373
Professional dealer
112
US
Omega Seamaster Diver 300 M 210.30.42.20.01.001 Unworn Steel 42mm Automatic
Omega Seamaster Diver 300 M Co-Axil Steel Black Dial on...
Php 223,147
Professional dealer
232
US
Rolex GMT-Master II 126710BLNR Very good Steel 40mm Automatic
Rolex GMT-Master II 126710BLNR Batman Bracelet Jubilé Fullset...
Php 1,008,689
Professional dealer
16
MC
Hublot Classic Fusion Ultra-Thin 545.OX.2210.LR New Rose gold 45mm Manual winding
TOP
Hublot Classic Fusion, new, ultra-thin, rose gold, manual wind...
Php 761,026
Professional dealer
57
CH
Rolex GMT-Master II 16710T Very good Steel 40mm Automatic
Rolex GMT-Master II 16710 PEPSI No Holes Just serviced
Php 644,546
Professional dealer
94
IT
Rolex Submariner (No Date) 124060 Unworn Steel 41mm Automatic
Rolex Submariner (No Date) | NEU | 2020 | FullSet
Php 769,946
Professional dealer
187
DE
Breitling Navitimer R23322 Very good Red gold 41.5mm Automatic
Breitling Navitimer Chronograph 18K Roségold Automatik...
Php 580,742

Sold by Chrono24

DE
Omega Seamaster 300 233.32.41.21.01.001 Very good Steel 41mm Automatic
Omega Seamaster 300 Limited Edition Spectre full set
Php 530,487
Professional dealer
326
DE
Rolex Datejust 116234 Very good Steel 36mm Automatic
Rolex Datejust white roman numerals TOP conditions - 4/2018...
Php 495,392
Professional dealer
202
IT

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.