Over 400,000 watches covered by Chrono24 Buyer Protection

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Tudor Black Bay Fifty-Eight M79010SG-0001 New Silver 39mm Automatic
TOP
Tudor Black Bay Fifty-Eight 925
NZ$7,002
+ NZ$71 for shipping
Professional dealer
4.81 (9)
MY
Ulysse Nardin Marine Chronometer Manufacture 1183-126-3/42 New Steel 43mm Automatic
TOP
Ulysse Nardin Marine Chronometer Manufacture NEW
NZ$11,601
+ NZ$118 for shipping
Professional dealer
4.97 (22)
ES
Ball DG3030B-S1CJ-BE New Titanium 40mm Automatic
TOP
Ball DG3030B-S1CJ-BE Roadmaster Marine GMT LIMITED EDITION...
NZ$3,902
+ NZ$53 for shipping
Professional dealer
4.81 (671)
US
Omega Seamaster 300 2234.50 Good Steel 41mm Automatic
TOP
Omega Seamaster 300 GMT 50th anniversary model 2234.50 Black
NZ$4,336
Free shipping
Professional dealer
4.79 (113)
JP
Rolex Sea-Dweller 126600 Very good Steel 42mm Automatic
Rolex Sea-Dweller "Single Red" Automatik Herrenuhr Oyster...
NZ$23,628
+ NZ$273 for shipping
Sold by Chrono24
DE
Wempe Very good 42mm Automatic New Zealand, Rodney, Warkworth
Wempe Zeitmeister
NZ$3,050
Excl. shipping
Private Seller
NZ
Cartier Santos 100 W20073X8 Very good Steel 41mm Automatic
TOP
Cartier Santos 100 Stainless Steel Iced Out Watch W20073X8
NZ$18,015
+ NZ$149 for shipping
Professional dealer
4.79 (435)
US
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
NZ$8,986
+ NZ$293 for shipping
Professional dealer
4.96 (661)
US
Ball DG3030B-S1CJ-BK New Titanium 40mm Automatic
TOP
Ball DG3030B-S1CJ-BK Roadmaster Marine GMT LIMITED EDITION...
NZ$3,902
+ NZ$53 for shipping
Professional dealer
4.81 (671)
US
Zenith 96.2062.405/27.C707 Very good Palladium 45.5mm Automatic
TOP
Zenith Stratos Pole2Pole Fly-back Palladium' Coated SS -...
NZ$7,848
Free shipping
Professional dealer
4.78 (765)
NL
Ball Conductor CM2068D-LJ-BK New Steel 30.8mm Automatic
TOP
Ball Conductor Chronograph Tonneau CM2068D-LJ-BK
NZ$4,086
+ NZ$94 for shipping
Professional dealer
4.89 (111)
NL
Rolex Datejust 41 126334 New White gold 41mm Automatic
TOP
Rolex Datejust 41 Diamond Index Black Oyster Bracelet (New...
NZ$22,721
Free shipping
Professional dealer
4.97 (38)
HK
Zenith Pilot Type 20 95.2420.5011/21.C723 Very good Titanium 57.5mm Manual winding New Zealand, Taupo
Zenith Type 20 Pilot Montre Limited Edition
NZ$17,500
+ NZ$29 for shipping
Professional dealer
NZ
Omega Seamaster Diver 300 M 210.30.42.20.03.001 Very good Steel 42mm Automatic
Omega Seamaster Diver 300M Automatik Stahl Ref. 210.30.42.20.0...
NZ$6,909
+ NZ$154 for shipping
Sold by Chrono24
DE
Omega Seamaster Planet Ocean 232.30.44.22.01.001 Very good Steel 43.5mm Automatic New Zealand, Palmerston North
Omega Seamaster Planet Ocean
NZ$8,000
Excl. shipping
Private Seller
NZ
Cartier Santos 100 W20090X8 Very good Steel 41mm Automatic
TOP
Cartier Santos 100 Chronograph Stainless Steel Iced Out Watch...
NZ$24,020
+ NZ$149 for shipping
Professional dealer
4.79 (435)
US
Zodiac Sea Wolf Zodiac Super SeaWolf 68 Saturation Andy Mann Limited Edition New Steel 45mm Automatic
TOP
Zodiac Super SeaWolf 68 Saturation Andy Mann Limited Edition...
Price on request
+ NZ$101 for shipping
Professional dealer
4.99 (504)
IT
Chopard Mille Miglia 8459 Very good Steel 44mm Automatic
TOP
Chopard Mille Miglia GT XL Limited edition GRAND PRIX LIMITED...
NZ$8,701
Free shipping
Professional dealer
4.78 (765)
NL
Omega Speedmaster Professional Moonwatch 311.92.44.51.01.003 Good Ceramic Automatic New Zealand, Auckland
Omega Dark Side Of The Moon Speedmaster
Price on request
+ NZ$38 for shipping
Professional dealer
4.92 (13)
NZ
Rolex Datejust 41 126334 Unworn Steel 41mm Automatic
TOP
Rolex Datejust 41 White Gold MOP Jubilee (New Full Set)
NZ$25,802
Free shipping
Professional dealer
4.97 (38)
HK
Seiko Grand Seiko SBGR311 Good Steel 42mm Automatic New Zealand, Taupo
Seiko Grand Seiko "Cookie" Limited Edition
NZ$6,250
Free shipping
Professional dealer
NZ
Omega Speedmaster Professional Moonwatch 311.30.44.51.01.002 Very good Steel 44mm Automatic
Omega Speedmaster Moonwatch Chronograph Automatik Ref....
NZ$10,151
+ NZ$273 for shipping
Sold by Chrono24
DE
Rolex Lady-Datejust Pearlmaster 80285 New Rose gold 29mm Automatic
TOP
Rolex Lady-Datejust Pearlmaster, new, 260 diamonds on bezel...
NZ$87,607
+ NZ$106 for shipping
Professional dealer
4.96 (41)
CH
Omega Constellation 168.005 Very good Rose gold 33.5mm Automatic
Omega Constellation
NZ$1,791
+ NZ$26 for shipping
Professional dealer
4.74 (33)
PT
Breitling Navitimer Very good Rose gold 46mm Automatic
Breitling Navitimer Navitimer Limited edition
NZ$21,325
+ NZ$171 for shipping
Professional dealer
4.93 (43)
NL
Rolex Datejust 41 126334 Unworn Steel 41mm Automatic
Rolex Datejust 41 Jubilee weiß 2021 NEU
NZ$21,649
+ NZ$1,022 for shipping
Professional dealer
4.93 (5)
DE
Chopard L.U.C 168561-3001 New Steel 43mm Automatic
Chopard L.U.C Perpetual Twin
NZ$27,025
+ NZ$150 for shipping
Professional dealer
4.94 (199)
US
Rolex Sea-Dweller Deepsea 116660 Very good Steel 44mm Automatic
Rolex Sea-Dweller Deepsea D-Blue James Cameron
NZ$24,737
+ NZ$169 for shipping
Professional dealer
4.86 (48)
FI
Rolex Submariner Date 126610LN New Steel 41mm Automatic
Rolex Submariner Date Black Dial 41mm (New Full Set)
NZ$25,417
Free shipping
Professional dealer
4.97 (38)
HK
Omega Seamaster Diver 300 M 212.30.41.20.03.001 Very good Steel 41mm Automatic New Zealand, Taupo
Omega Seamaster Automatic with Ceramic Bezel
NZ$6,250
Free shipping
Professional dealer
NZ

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Omega Seamaster 300 233.90.41.21.03.001 Very good Titanium 41mm Automatic
Omega Seamaster 300 Master Co-Axial Automatik 233.90.41.21.03....
NZ$10,321
+ NZ$273 for shipping
Sold by Chrono24
DE
Hublot Classic Fusion Ultra-Thin 515.NX.1270.LR New Titanium 45mm Manual winding
TOP
Hublot Classic Fusion ultra-thin, new, official Hublot...
NZ$11,679
+ NZ$106 for shipping
Professional dealer
4.96 (41)
CH
Oris 7489-60 Very good Rose gold 36mm Automatic
Oris Jules Verne Worldtimer 18k Pink Gold
NZ$11,089
+ NZ$26 for shipping
Professional dealer
4.74 (33)
PT

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.