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Omega De Ville Prestige 424.10.33.20.05.001 New Steel 32.7mm Automatic
TOP
Omega 424.10.33.20.05.001 De Ville Prestige
Php 147,907
Verified Dealer
19
HK
Omega Constellation Double Eagle 121.32.44.52.01.001 New Steel 44mm Automatic
TOP
Omega Constellation Double Eagle Day-Date Chrono (SPECIAL OFFER)
Php 302,947
Verified Dealer
1425
ES
Breitling Montbrillant Légende C23340 Very good Gold/Steel 47mm Automatic
TOP
Breitling Montbrillant Légende C23340 18k/SS Box & Papers
Php 372,784
Free shipping
Verified Dealer
268
US
Ball Engineer Hydrocarbon DG2018C-S10C-BK New Steel 42mm Automatic
TOP
Ball Engineer Hydrocarbon AeroGMT II 42mm
Php 185,945
Verified Dealer
44
NL
Rolex Datejust 178288 New Yellow gold 31mm Automatic
TOP
Rolex Datejust 31, new, official retail price: 39.600 CHF
Php 1,548,384
Verified Dealer
36
CH
Zenith El Primero 65.0520.4026 Very good White gold 44mm Automatic
TOP
Zenith Grande Class Grande Date Rattrapante, Split Second,...
Php 721,048
Verified Dealer
21
CH
Breitling Bentley Flying B R4436512/B874 Very good Rose gold 38mm Automatic
TOP
Breitling 18 K. Bentley Flying B Jumbo Chrono. Full set
Php 680,845
Verified Dealer
277
NL
Sinn 103 103.0619 New Steel 41mm Automatic
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
Php 140,174
Verified Dealer
75
DE
Casio G-Shock GWR-B1000X-1AER New Carbon 50,1mm
TOP
Casio Gravitymaster GWR-B1000X-1AER LIm-Edition
Php 57,157
Verified Dealer
140
ES
Omega Seamaster Diver 300 M 21230412003001 Very good Steel 41mm Automatic
Omega - Seamaster 300
Php 190,056
Verified Dealer
116
SE
Rolex Sea-Dweller Deepsea 116660 Unworn Steel 44,00mm Automatic
Rolex Sea-Dweller Deepsea
Php 787,835
Free shipping
Verified Dealer
5
DE
Rolex Sea-Dweller 126600 New Steel 43mm Automatic
Rolex Sea-Dweller 50th Year Anniversary 126600
Php 718,089
Free shipping
Verified Dealer
7
US
Rolex Oyster Perpetual Date 15200 Very good Steel 34mm Automatic
Rolex Oyster Perpetual Date 15200 34mm Black Dial
Php 240,899
Free shipping
Verified Dealer
40
UK
Hublot Classic Fusion Ultra-Thin 515.NX.1270.LR New Titanium 45mm Manual winding
TOP
Hublot Classic Fusion Ultra-Thin 45, official price: 11.900 CHF
Php 416,339
Verified Dealer
36
CH
Omega Speedmaster Professional Moonwatch 310.20.42.50.01.001 New Steel 42mm Manual winding
Omega Speedmaster Moonwatch Apollo 11 50th Anniversary NEW 2019
Php 736,914
Free shipping
Verified Dealer
104
IT
Omega Seamaster 168.0061 Good Steel 35mm Automatic
Omega Seamaster Chronometer, Automatik, ca. 1973
Php 82,960
Verified Dealer
207
DE
Audemars Piguet Royal Oak Concept 26589IO.OO.D002CA.01 Unworn Titanium 44mm Manual winding
Audemars Piguet Royal Oak Concept Tourbillon GMT 44 Titanium...
Php 10,009,561
Verified Dealer
692
NL
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust
Php 528,846
Free shipping
Verified Dealer
175
US
Omega Seamaster Planet Ocean 215.92.46.22.03.001 Very good Ceramic 45.5mm Automatic
Omega - Seamaster Planet Ocean
Php 374,681
Verified Dealer
116
SE
Rolex Submariner (No Date) 114060 Unworn Steel 40,00mm Automatic
Rolex Submariner (No Date) Ref. 114060
Php 651,666
Free shipping
Verified Dealer
5
DE
Rolex Datejust 126334 New Steel 41mm Automatic
Rolex Datejust 41mm 126334 Stainless Steel Jubilee Blue Roman
Php 526,253
Free shipping
Verified Dealer
7
US
Rolex Submariner (No Date) 114060 Very good Steel 40mm Automatic
Rolex Submariner Non-Date Black Ceramic 114060
Php 525,906
Free shipping
Verified Dealer
40
UK
Chaumet Liens W23870-02A New Rose gold 33mm Automatic
TOP
Chaumet Liens 33, new, official retail price: 14.410 CHF
Php 319,932
Verified Dealer
36
CH
Omega Speedmaster Professional Moonwatch 311.33.42.50.01.001 Very good Steel 42mm Manual winding
Omega Speedmaster 50 Anniversario
Php 503,482
Free shipping
Verified Dealer
104
IT
Omega Seamaster 168.024 Very good Steel 35mm Automatic
Omega Seamaster Chronometer, Automatik, ca. 1968
Php 90,970
Verified Dealer
207
DE
Rolex Sky-Dweller 326935 Very good Rose gold 42mm Automatic
Rolex Sky-Dweller Sundust rose gold from 2016 with box + papers
Php 2,228,479
Verified Dealer
692
NL
Rolex Datejust 126334 Unworn Steel 41mm Automatic
Rolex Datejust 41 Blue Index Dial Oyster Bracelet [Unworn]
Php 544,141
Free shipping
Verified Dealer
84
US
Omega De Ville Hour Vision 433.33.41.21.03.001 Very good Steel 41mm Automatic
Omega - De Ville Hour Vision Co-Axial Master Chronometer
Php 195,486
Verified Dealer
116
SE
Rolex Submariner Date 116610LV Good Steel 40,00mm Automatic
Rolex Submariner Date Ref. 116610LV
Php 887,387
Free shipping
Verified Dealer
5
DE
Rolex Sea-Dweller 126600 Very good Steel 43mm Automatic
Rolex Sea-Dweller Anniversary 126600
Php 725,867
Verified Dealer
 
US
Omega Seamaster Planet Ocean Chronograph 215.30.46.51.03.001 Good Steel 45.5mm Automatic
Omega Seamaster Planet Ocean Chronograph 215.30.46.51.03.001
Php 315,544
Free shipping
Verified Dealer
40
UK
Rolex Lady-Datejust Pearlmaster 80319 New White gold 29mm Automatic
TOP
Rolex Lady-Datejust Pearlmaster, official retail price: 32.600...
Php 1,161,689
Verified Dealer
36
CH
Rolex Daytona 116500LN Very good Steel 40mm Automatic
Rolex Daytona 116500LN
Php 1,153,600
Free shipping
Verified Dealer
473
UK
Rolex Datejust 126334 Very good Steel 41mm Automatic
Rolex Datejust
Php 629,948
Free shipping
Verified Dealer
175
US
Rolex Daytona 116523 Very good Gold/Steel 40mm Automatic
Rolex Cosmograph Daytona steel / gold black diamond dial
Php 769,526
Verified Dealer
692
NL
Rolex Datejust 126334 Good Gold/Steel 41mm Automatic
Rolex Datejust 41 Blue Index Dial Oyster [Unpolished/Complete]
Php 461,184
Free shipping
Verified Dealer
84
US
Rolex Sea-Dweller 126600 Unworn 43mm Automatic
Rolex Pro Hunter - Sea Dweller Red
Php 1,400,982
Verified Dealer
116
SE
Rolex Submariner Date 116610LN Unworn Steel 40,00mm Automatic
Rolex Submariner Date Ref. 116610LN
Php 742,064
Free shipping
Verified Dealer
5
DE
Rolex Datejust 126334 Unworn Steel 41mm Automatic
Rolex Datejust 41mm Stainless Steel Blue Diamond Dial Watch...
Php 648,043
Free shipping
Verified Dealer
215
US
Rolex GMT-Master II 126710BLNR-0002 New Steel 40mm Automatic
Rolex GMT-Master II 126710BLNR UK 2020 Batman Batgirl
Php 950,024
Free shipping
Verified Dealer
40
UK
Rolex Lady-Datejust Pearlmaster 81209 New White gold 34mm Automatic
TOP
Rolex Pearlmaster 34, new, official retail price: 33.200 CHF
Php 1,121,363
Verified Dealer
36
CH
Rolex Sea-Dweller Deepsea 116660 Unworn Steel 44mm Automatic
Rolex Deepsea Sea-Dweller 116660
Php 780,377
Free shipping
Verified Dealer
473
UK
Rolex GMT-Master II 16710 Unworn Steel 40mm Automatic
Rolex GMT Master II Coke LC 100 unworn and sealed
Php 1,029,792
Verified Dealer
423
DE
Rolex Datejust II 126334 Unworn Steel 41mm Automatic
Rolex Datejust II 41 Rhodium Jubilee NEW 2020 with B+P
Php 626,492
Verified Dealer
692
NL
Omega Good Yellow gold 54mm Manual winding
Omega Chronometer DDR Grade Very best 18k Gold World Time 1916
Php 532,089
Free shipping
Verified Dealer
16
DE
Omega Seamaster Planet Ocean 215.30.40.20.04.001 Very good Steel 39.5mm Automatic
Omega - Seamaster Planet Ocean Co‑Axial Master Chronometer
Php 214,491
Verified Dealer
116
SE
Rolex Lady-Datejust 78274 Very good Steel 31,00mm Automatic
Rolex Lady-Datejust 31mm
Php 316,965
Free shipping
Verified Dealer
5
DE
Omega Seamaster Planet Ocean 215.30.44.21.01.001 New Steel 43.5mm Automatic
Omega Planet Ocean 8900 43.5mm Black - 2019 5 Year Omega...
Php 252,757
Free shipping
Verified Dealer
297
US
Breitling Superocean Héritage AB2030121B1S1 Very good Steel 44mm Automatic
Breitling Superocean Héritage II B20 AB2030121B1S1 Automatic 44mm
Php 186,612
Free shipping
Verified Dealer
40
UK
Breguet Reine de Naples 8908BB/52/864.D00D New White gold Automatic
TOP
Breguet Reine de Naples, new, official retail price: 35.200 CHF
Php 1,316,046
Verified Dealer
36
CH
Rolex Yacht-Master II 116688 Unworn Yellow gold 44mm Automatic
Rolex Yacht-Master II 116688
Php 2,100,232
Free shipping
Verified Dealer
473
UK
Rolex Daytona 116500LN Very good Steel 40mm Automatic
Rolex Daytona perfect condition box and papers
Php 1,344,468
Verified Dealer
423
DE
Rolex Daytona 116500LN Unworn Steel 40mm Automatic
Rolex Cosmograph Daytona White NEW / UNWORN from 2018 with B + P
Php 1,341,664
Verified Dealer
692
NL
Rolex Day-Date 36 18238 Very good Yellow gold 36mm Automatic
Rolex DAY-DATE | 18238 | Box & Certificate | Rolex Service 2018
Php 800,994
Verified Dealer
23
DE
Rolex Datejust 126334 Unworn Gold/Steel 41mm Automatic
Rolex - Datejust 41
Php 608,178
Verified Dealer
116
SE
Rolex Datejust 16233 Good Gold/Steel 36,00mm Automatic
Rolex Datejust 36 Stahl/Gold Champagner Oyster Ref. 16233
Php 316,965
Free shipping
Verified Dealer
5
DE
Rolex Sea-Dweller 126600 Very good Steel 43mm Automatic
Rolex Sea-Dweller
Php 704,868
Free shipping
Verified Dealer
8
US
Rolex Lady-Datejust 69178 Very good Yellow gold 26mm Automatic
Rolex Lady-Datejust 26mm 69178
Php 505,548
Free shipping
Verified Dealer
40
UK
Hublot Classic Fusion Ultra-Thin 545.OX.2210.LR New Rose gold 45mm Manual winding
TOP
Hublot Classic Fusion Ultra-Thin, official retail price:...
Php 851,905
Verified Dealer
36
CH
Rolex GMT-Master 1675 Very good Steel 40mm Automatic
Rolex GMT-Master Pepsi 1675
Php 1,526,824
Free shipping
Verified Dealer
473
UK
Rolex Yacht-Master 126655 New Rose gold 40mm Automatic
Rolex Yachtmaster new model LC 100 everrose gold unworn box...
Php 1,487,503
Verified Dealer
423
DE
Omega Seamaster Planet Ocean 232.30.42.21.01.004 Very good Steel 42mm Automatic
Omega Seamaster Planet Ocean 42 Skyfall James Bond 007 2013 B + P
Php 380,472
Verified Dealer
692
NL
Rolex Daytona 16520 New Steel 40mm Automatic
Rolex DAYTONA Zenith | 16520 | NOS | Sticker | Full Set | W...
Php 2,860,692
Verified Dealer
23
DE
Rolex Datejust 126334 Very good Gold/Steel 41mm Automatic
Rolex - Datejust 41
Php 564,737
Verified Dealer
116
SE
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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.


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