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Rolex Day-Date Tridor Masterpiece Meteorite Diamond Dial
Top
Rolex Day-Date Tridor Masterpiece Meteorite Diamond Dial
Php 2,426,879
Seller
Juwelier Burger, since 2001
406
NL
Rolex Datejust 28 Everose Diamond President NEW
Top
Rolex Datejust 28 Everose Diamond President NEW
Php 1,658,879
Seller
Juwelier Burger, since 2001
406
NL
Panerai RADIOMIR 1940 3 DAYS GMT PAM570 Limited 300 ex
Top
Panerai RADIOMIR 1940 3 DAYS GMT PAM570 Limited 300 ex
Php 1,345,536
Free shipping
Seller
RIVIERAWATCH
47
FR
Omega Seamaster Aqua Terra 150M Co-Axial 34 MM Ref. 231.15.34....
Top
Omega Seamaster Aqua Terra 150M Co-Axial 34 MM Ref. 231.15.34....
Php 470,016
Seller
WINGOO WATCHES
180
IT
Omega Seamaster PloProf 1200M
Top
Omega Seamaster PloProf 1200M
Php 344,632
Free shipping
Seller
Rent a Box Schmuck und Uhren AG
 
CH
Hublot 301.AI.460.RX
Top
Hublot 301.AI.460.RX
price on request
Seller
Deluxe ( Asia ) Ltd
 
HK
Rolex Sky Dweller Blue Blau Bleu LAGERND ON STOCK
Rolex Sky Dweller Blue Blau Bleu LAGERND ON STOCK
Php 1,075,200
Seller
LUXUS RITTER GmbH & Co. KG
47
DE
Omega Constellation Ref. 168.004 18k Gold Vintage
Omega Constellation Ref. 168.004 18k Gold Vintage
Php 416,072
Seller
Best Deals HD
 
US
Omega Seamaster 300 Spectre 007 James Bond Limited Edition
Omega Seamaster 300 Spectre 007 James Bond Limited Edition
Php 453,020
Seller
Swiss Horology
 
UK
Rolex GMT II Ceramica art. Rg659
Rolex GMT II Ceramica art. Rg659
Php 362,496
Seller
Stroppiana SRL
208
IT
Rolex Rare S/S O/P UAE Air Force Pepsi Bezel GMT-Master...
Rolex Rare S/S O/P UAE Air Force Pepsi Bezel GMT-Master...
Php 6,621,063
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
60
UK
Rolex Datejust
Rolex Datejust
Php 421,209
Free shipping
Seller
LABELLE JEWELRY
 
US
Rolex Oyster Datejust II Jubilee Steel Blue Dial 41 mm (Full Set)
Rolex Oyster Datejust II Jubilee Steel Blue Dial 41 mm (Full Set)
Php 374,784
Seller
Kleen Edelmetalen
109
NL
Omega Seamaster Professional 300m Automatic - 41 mm
Omega Seamaster Professional 300m Automatic - 41 mm
Php 103,834
Free shipping
Seller
wagener-gold International e.K.
638
DE
Corum 895-931-06-0371-AN92
Top
Corum 895-931-06-0371-AN92
Php 361,744
Seller
Deluxe ( Asia ) Ltd
 
HK
Ulysse Nardin - Maxi Marine Chronometer Manufacture - 263-66 -...
Auction
Ulysse Nardin - Maxi Marine Chronometer Manufacture - 263-66 -...
Php 110,592
Estimated price
Seller
Catawiki BV
 
Breitling Chronomat Evolution B13356 18k Gold & Steel
Breitling Chronomat Evolution B13356 18k Gold & Steel
Php 205,468
Seller
Best Deals HD
 
US
Omega Seamaster 300  Spectre Limited Edition
Omega Seamaster 300 Spectre Limited Edition
Php 417,792
Seller
Watcheclock
35
IT
Rolex GMT II Ceramica Blu Nero 116710BLNR 07/2015 art. Rg1057
Rolex GMT II Ceramica Blu Nero 116710BLNR 07/2015 art. Rg1057
Php 509,952
Seller
Stroppiana SRL
208
IT
Omega Seamaster 300 James Bond 007 "SPECTRE" Limited...
Top
Omega Seamaster 300 James Bond 007 "SPECTRE" Limited...
Php 424,163
Seller
Private seller
 
CH
Rolex Gmt Master  Ref:16700 Stainless Steel Blue Red Pepsi...
Rolex Gmt Master Ref:16700 Stainless Steel Blue Red Pepsi...
Php 444,067
Seller
La Jolla Jewelry and Collateral Loan Company
9
US
Rolex Oyster Datejust Turnograph White Gold Bezel Blue Dial 36 mm
Rolex Oyster Datejust Turnograph White Gold Bezel Blue Dial 36 mm
Php 301,056
Seller
Kleen Edelmetalen
109
NL
Rolex Datejust
Rolex Datejust
Php 485,314
Seller
Juwelier Rubin GbR
 
DE
Ball for BMW Power Reserve
Top
Ball for BMW Power Reserve
Php 103,834
Seller
Private seller
 
DE
Bulgari DG42BSCVDCH
Top
Bulgari DG42BSCVDCH
Php 320,966
Seller
Deluxe ( Asia ) Ltd
 
HK
Breitling Colt Chronometer Automatic - A17380
Breitling Colt Chronometer Automatic - A17380
Php 97,690
Seller
wagener-gold International e.K.
638
DE
Omega Seamaster James Bond 007 Limited Edition 212.30.36.20.51...
Omega Seamaster James Bond 007 Limited Edition 212.30.36.20.51...
Php 168,960
Seller
Uhren2000 GmbH
206
DE
Rolex Date zaffiro art. Rd358nl
Rolex Date zaffiro art. Rd358nl
Php 172,032
Seller
Stroppiana SRL
208
IT
Rolex Datejust
Rolex Datejust
Php 428,914
Free shipping
Seller
LABELLE JEWELRY
 
US
Rolex - Submariner - 16610 - Men - 1990-1999
Auction
Rolex - Submariner - 16610 - Men - 1990-1999
Php 294,912
Estimated price
Seller
Catawiki BV
 
Rolex Explorer I Ref- 1016 Stainless Steel Box Punched Booklet...
Rolex Explorer I Ref- 1016 Stainless Steel Box Punched Booklet...
Php 669,696
Seller
Bachmann & Scher
 
DE
Rolex Sea-Dweller Edelstahl Automatik Herrenuhr Service Juli 2017
Rolex Sea-Dweller Edelstahl Automatik Herrenuhr Service Juli 2017
Php 368,025
Free shipping
Seller
Timeless Watches GmbH
86
DE
Rolex Oyster Perpetual Datejust Stainless Steel White Gold Watch
Rolex Oyster Perpetual Datejust Stainless Steel White Gold Watch
Php 192,369
Seller
La Jolla Jewelry and Collateral Loan Company
9
US
Omega Seamaster Planet Ocean 42mm
Omega Seamaster Planet Ocean 42mm
Php 159,683
Seller
Uhrencenter Berlin
178
DE
Omega Speedmaster Professional Moonwatch Moonphase
Omega Speedmaster Professional Moonwatch Moonphase
Php 437,324
Seller
Watch Gallery
 
SE
Hublot Big Bang Sang Bleu (Limited Edition)
Hublot Big Bang Sang Bleu (Limited Edition)
Php 2,236,415
Free shipping
Seller
Istock LTD
22
LV
Rolex submariner art. Rb639
Rolex submariner art. Rb639
Php 304,128
Seller
Stroppiana SRL
208
IT
Rolex 16610LV 16610 LV "FLAT 4" Submariner 50th...
Rolex 16610LV 16610 LV "FLAT 4" Submariner 50th...
Php 919,468
Seller
European Watch Company
50
US
Rolex Submariner Date 16613 Stahl Gold 750 Automatik
Rolex Submariner Date 16613 Stahl Gold 750 Automatik
Php 398,745
Seller
Juwelier Rieger
93
DE
Rolex Oyster Perpetual Datejust 41 126334 NEW MODEL
Rolex Oyster Perpetual Datejust 41 126334 NEW MODEL
Php 445,440
Seller
Filipucci Juweliers
264
NL
Rolex Submariner 1680 "Red" "Mark IV"
Rolex Submariner 1680 "Red" "Mark IV"
Php 857,088
Seller
Le Collection´heure
48
BE
Rolex Oyster Perpetual Day Date ref. 18238– Unisex – 1990-1999...
Auction
Rolex Oyster Perpetual Day Date ref. 18238– Unisex – 1990-1999...
Php 546,816
Estimated price
Seller
Catawiki BV
 
Ulysse Nardin Tellurium Johannes Kepler 18kt Gelbgold Automati...
Ulysse Nardin Tellurium Johannes Kepler 18kt Gelbgold Automati...
Php 4,171,160
Seller
Juwelier Ralf Häffner
327
DE
Omega Speedmaster Professional Moonwatch Moonphase
Omega Speedmaster Professional Moonwatch Moonphase
Php 437,324
Seller
Watch Gallery
 
SE
Vacheron Constantin Overseas Automatic Chronometer
Top
Vacheron Constantin Overseas Automatic Chronometer
Php 304,917
Seller
Private seller
 
UK
Rolex Seadweller SCAT/GAR art. Rb1172
Rolex Seadweller SCAT/GAR art. Rb1172
Php 353,280
Seller
Stroppiana SRL
208
IT
Omega Aqua Terra 150M Co-Axial Master Chronometer 41mm G
Omega Aqua Terra 150M Co-Axial Master Chronometer 41mm G
Php 233,410
Seller
Plus Watch - Luxury Watches
2095
IT
Franck Muller Vanguard Iced Out Diamonds Full Pave Dial
Franck Muller Vanguard Iced Out Diamonds Full Pave Dial
Php 1,005,772
Seller
LUXUS RITTER GmbH & Co. KG
47
DE
Rolex 116710LN   GMT Master II Black Index Dial
Rolex 116710LN GMT Master II Black Index Dial
Php 419,623
Seller
K&S Watch & Jewellery
10
HK
Rolex Sea-Dweller
Rolex Sea-Dweller
Php 706,560
Seller
FIRST ONE SRLS
10
IT
Rolex Daytona Cosmograph Stainless steel black
Rolex Daytona Cosmograph Stainless steel black
Php 706,560
Seller
Timepiece Bank
201
BE
Rolex Day-Date President Gold Ref.1803
Rolex Day-Date President Gold Ref.1803
Php 513,024
Seller
Juwelier Pieter Jacobs
104
NL
Omega Seamaster 300
Omega Seamaster 300
Php 255,629
Seller
Watch Gallery
 
SE
Breitling Navitimer Heritage
Top
Breitling Navitimer Heritage
Php 166,810
Seller
Private seller
 
RO
Rolex GMT I zaffiro art. Rg363
Rolex GMT I zaffiro art. Rg363
Php 365,568
Seller
Stroppiana SRL
208
IT
Patek Philippe Perpetual Calendar Ref-5970R-001 18k Rose Gold...
Patek Philippe Perpetual Calendar Ref-5970R-001 18k Rose Gold...
Php 7,340,849
Seller
Bachmann & Scher
 
DE
Rolex Submariner Date - Full Set - Clasp acciaio oro
Rolex Submariner Date - Full Set - Clasp acciaio oro
Php 546,816
Seller
PASSIONE VINTAGE
66
IT
Omega Seamaster Professional Diver 300M
Omega Seamaster Professional Diver 300M
Php 100,762
Seller
Juwelier Burger, since 2001
406
NL
TAG Heuer Grand Carrera Automatik Chronograph
TAG Heuer Grand Carrera Automatik Chronograph
Php 344,678
Seller
Prestige Luxusuhren GmbH
2265
DE
Rolex 41 Mm In Solid 18kt Rose Gold Diamonds
Rolex 41 Mm In Solid 18kt Rose Gold Diamonds
Php 3,081,964
Seller
Watch My Diamonds
38
US
Rolex Oyster Submariner Gold Steel Blue Dial 40 mm (Full Set)
Rolex Oyster Submariner Gold Steel Blue Dial 40 mm (Full Set)
Php 423,936
Seller
Kleen Edelmetalen
109
NL
Omega Seamaster Planet Ocean Chronograph
Omega Seamaster Planet Ocean Chronograph
Php 348,893
Seller
Watch Gallery
 
SE

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.