Why Chrono24? Log in
Brand
Model
Price
Case diameter
Year
Location
More
Your selection
Clear selection

Your selection
Clear selection

Your selection
Clear selection

Sorry, your search did not match any items
Your selection
Clear selection

Sorry, your search did not match any items
Your selection
Clear selection

Sorry, your search did not match any items
Basic information
Type of watch
Categories
More...
Reference number
More...
New/Pre-owned
Offer type
Gender
Availability
Condition
More...
Scope of delivery
Characteristics & functions
Movement
Case material
More...
Dial
More...
Glass
More...
Functions
More...
Thickness
More...
Bezel material
More...
Dial numerals
Water resistance
More...
Others
Bracelet/strap
Bracelet material
More...
Clasp
More...
Lug width
More...
Bracelet color
More...
Clasp material
More...
Save this search Cancel

View

Sort by

TOP
Breitling Emergency K56121.1 Yellow Gold - Box & Papers 2004
Php 1,079,757
Seller
Mark Worthington Jewellers
204
UK
TOP
A. Lange & Söhne Taschenuhr A. Lange & Söhne Gold savonnette...
Php 601,045
Free shipping
Seller
Antiquitäten carsten berger
9
DE
TOP
Ball Engineer Hydrocarbon AeroGMT II 42mm
Php 190,019
Seller
Vaessen Juweliers
22
NL
TOP
Omega Globemaster
Php 232,308
Seller
Ken's Watches
6
HK
TOP
Rolex Lady-Datejust Pearlmaster 29
Php 2,655,389
Seller
Chronometrie Stäuble AG
18
CH
TOP
Sinn 103 St Sa RB Classic Watch Sondermodell
Php 143,245
Seller
Classic Watch
57
DE
TOP
Casio GMW-B5000GD-9 G-SHOCK
Php 32,099
Seller
First Advanced Watches
100
ES
TOP
Breitling Edition Special Limited A 25 Exemplaires - G34360
Php 5,846,742
Free shipping
Seller
Pawndeluxe
401
NL
TOP
Omega Seamaster Planet Ocean Master 43,5 PyeongChang 2018 Limited
Php 319,232
Seller
Uhren2000 GmbH
429
DE
TOP
Rolex Oyster Perpetual Date Vintage 34mm Yellow Gold Ref. 1503
Php 456,046
Seller
Orologeria Duomo Milano
110
IT
TOP
Eberhard & Co. Chrono 120 ÉME Aniversario Edicion Limitada
Php 508,667
Seller
CANTELI JOYEROS SL
43
ES
Rolex DAY-DATE Platinum | 118366 | Baguette Bezel | Full Set |
Php 3,391,110
Seller
nobeluhren-store.de
23
DE
Omega Seamaster Diver 300 M Full Set
Php 225,100
Seller
LUXUS-PORT
127
DE
TOP
Breguet Secret de la Reine, new, official retail price 90.000 CHF
Php 2,761,625
Seller
Chronometrie Stäuble AG
18
CH
Rolex Datejust 41 Ref. 126334
Php 494,050
Seller
Steiner Maastricht
332
NL
Rolex Datejust
Php 920,862
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
632
DE
TOP
Ulysse Nardin 41 Maxi Marine Chronometer Power Reserve Display...
Php 204,636
Free shipping
Seller
Pawndeluxe
401
NL
Chopard 161926-5001 L.U.C Quattro - 9 Day Power Reserve
Php 958,557
Free shipping
Seller
Watch Club
91
UK
Breitling :大進洋行
Php 328,013
Seller
Daisinyoko & Co.
 
JP
Rolex Datejust 126334
Php 485,280
Seller
Orologi360
30
IT
Rolex DAYTONA | 116506 | Platin Ice Blue | Full Set 2015 | LC100
Php 3,566,512
Seller
nobeluhren-store.de
23
DE
Omega Seamaster Diver 300 M 2014 Like NEW, Full SET
Php 175,402
Seller
LUXUS-PORT
127
DE
TOP
Hublot Classic Fusion Ultra-Thin 45
Php 902,482
Seller
Chronometrie Stäuble AG
18
CH
Breitling Bentley 6.75 Ref. A44362
Php 239,716
Seller
Steiner Maastricht
332
NL
Patek Philippe 10 Days
Php 2,484,865
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
632
DE
TOP
Omega De Ville Prestige Co-Axial 18K Red Gold 36.5 MM Caliber...
Php 190,019
Free shipping
Seller
Pawndeluxe
401
NL
Rolex 1002 Oyster Perpetual 34mm - 1968 Chronometer Certificate
Php 302,189
Free shipping
Seller
Watch Club
91
UK
Omega コンステレーション コーアクシャル 腕時計123.25.38.22.02.001 自動巻 K18PG SSピンク...
Php 289,801
Seller
Daisinyoko & Co.
 
JP
Breitling Chronomat Airborne 44 AB01154G/BD13 v.3/2018
Php 309,293
Seller
Watchplanet
114
DE
Rolex DAY-DATE 40 | 228206 | Platin Ice Blue | Full Set 2018 |...
Php 2,864,904
Seller
nobeluhren-store.de
23
DE
Omega Seamaster Diver 300 M - Exclusiv Armband + Papiere
Php 99,395
Seller
LUXUS-PORT
127
DE
TOP
Tiffany Atlas 42, new, official retail price 16.200 CHF
Php 477,800
Seller
Chronometrie Stäuble AG
18
CH
Rolex Submariner Date Reference 16610 T
Php 463,934
Seller
Guarded Crown
19
US
Rolex Datejust
Php 862,394
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
632
DE
TOP
Chopard L.U.C PRO ONE 42.5 BLACK DIAL DEEP DIVER - 1689121
Php 181,249
Free shipping
Seller
Pawndeluxe
401
NL
Omega Seamaster Planet Ocean
Php 347,881
Seller
Leihhaus Lohmann
26
DE
Breitling 時計 腕時計 メンズ腕時計 ブライトリング ナビタイマー 1 B01 クロノグラフ 46...
Php 289,801
Seller
Daisinyoko & Co.
 
JP
TAG Heuer Monaco LS Chronograph Kaliber 12 – 9/2014 Box und...
Php 268,365
Seller
Watchplanet
114
DE
Rolex 16520 A-Serie Zenith DAYTONA 1999 Full Set
Php 1,695,555
Seller
nobeluhren-store.de
23
DE
Panerai PAM 00382 382 Bronzo full set
Php 1,356,444
Seller
MYTHICWATCH
 
FR
TOP
Rolex Lady-Datejust
Php 265,326
Seller
Chronometrie Stäuble AG
18
CH
Tudor Black Bay Chrono 79350
Php 181,163
Seller
Guarded Crown
19
US
Rolex Daytona 18 kt Gelbgold
Php 2,017,126
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
632
DE
TOP
Blancpain Villeret Ultra Thin White Dial Chronometer CAL 64.1...
Php 181,249
Free shipping
Seller
Pawndeluxe
401
NL
Breitling Transocean Chrono Unitime
Php 362,206
Seller
M.Dodt GmbH & Co. KG
21
DE
Chopard 腕時計 メンズ腕時計 時計 ショパール メンズウォッチ ミッレミリアGTS クロノグラフ 168571-30...
Php 192,750
Seller
Daisinyoko & Co.
 
JP
TAG Heuer Monaco Ref.: CW2118 limitierte Auflage
Php 233,285
Seller
Watchplanet
114
DE
Rolex 118209 | Weißgold | Oysterband | LC100 | Rolex Service
Php 993,946
Seller
nobeluhren-store.de
23
DE
Panerai PAM 00217 Marina Militare Destro full set
Php 730,843
Seller
MYTHICWATCH
 
FR
TOP
Rolex Lady-Datejust
Php 902,482
Seller
Chronometrie Stäuble AG
18
CH
Glashütte Original Senator Chronometer 5801010404
Php 871,165
Seller
Chronothek Uhrenhandels GmbH
58
AT
Rolex GMT Master II
Php 806,850
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
632
DE
TOP
Hermès Clipper XL Ø 44 mm Automatic Chronograph - CP1910
Php 134,475
Free shipping
Seller
Pawndeluxe
401
NL
Breitling Navitimer 8
Php 312,801
Seller
M.Dodt GmbH & Co. KG
21
DE
Chopard 腕時計 メンズ腕時計 時計 ショパール モナコグランプリ GPMH 2016 レース エディション...
Php 192,750
Seller
Daisinyoko & Co.
 
JP
Breitling Navitimer 8 Chronograph 43mm v.2019 neu Stahlband...
Php 217,499
Seller
Watchplanet
114
DE
Rolex DAY-DATE | 18238 | Box & Certificate | Rolex Service 2018
Php 818,544
Seller
nobeluhren-store.de
23
DE
Rolex Explorer II 16550 punched papers 1989 & revision 2011
Php 695,762
Seller
MYTHICWATCH
 
FR
TOP
Rolex Lady-Datejust
Php 278,606
Seller
Chronometrie Stäuble AG
18
CH
Breitling Crosswind Racing
Php 190,019
Seller
Leihhaus Lohmann
26
DE
Rolex GMT Master II
Php 608,061
Free shipping
Seller
A. Grimmeissen Uhren An- und Verkauf
632
DE
TOP
Omega Seamaster Olympic Games London Co-Axial Limited Edition
Php 169,556
Free shipping
Seller
Pawndeluxe
401
NL
Rolex Datejust II 116333
Php 601,129
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
371
UK
Breitling 腕時計 メンズ腕時計 時計 ブライトリング クロノマット エヴォリューション B13356 自動巻 SS...
Php 169,030
Seller
Daisinyoko & Co.
 
JP
  • 30
  • 60
  • 120

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.