Buyer Protection Authenticity Guarantee Why Chrono24? Great Britain  | GBP
Log inLog in
Brand
Model
Price
Case diameter
Year
Location
More
Your selection

Your selection

Your selection

Sorry, your search did not match any items
Your selection

Sorry, your search did not match any items
Your selection

Sorry, your search did not match any items
Basic information
Type of watch
Ref. No.
More...
New/Pre-owned
Availability
Gender
Condition
More...
Scope of delivery
Characteristics & functions
Movement
Case material
More...
Dial
More...
Glass
More...
Functions
More...
Thickness
More...
Material bezel
More...
Dial numerals
Waterproof
More...
Others
Bracelet/strap
Bracelet material
More...
Lug width
More...
Bracelet color
More...
Clasp material
More...
Cancel

Sort by

Breitling Navitimer K23322 - Serviced By Breitling
TOP
Breitling Navitimer K23322 - Serviced By Breitling
£17,295
Free shipping
Seller
Mark Worthington Jewellers
23
UK
Breitling Emergency J56321 - Serviced By Breitling
TOP
Breitling Emergency J56321 - Serviced By Breitling
£8,665
Free shipping
Seller
Mark Worthington Jewellers
23
UK
Omega Seamaster Aqua Terra
TOP
Omega Seamaster Aqua Terra
£3,480
Free shipping
Seller
Watch Philosophy
 
UK
Omega De Ville Prestige Co Axial
TOP
Omega De Ville Prestige Co Axial
£1,850
Seller
David Summerfield Ltd
20
UK
Rolex Oyster Perpetual DateJust Steel Gold Mens Watch 1625
TOP
Rolex Oyster Perpetual DateJust Steel Gold Mens Watch 1625
£1,999
Seller
Watch World Star
153
UK
Rolex Sea-Dweller Deepsea
TOP
Rolex Sea-Dweller Deepsea
£10,750
Free shipping
Seller
The Watch Collector Ltd.
31
UK
Omega Seamaster Planet Ocean
TOP
Omega Seamaster Planet Ocean
£3,700
Seller
Swiss Time Traders
 
UK
Bremont U2 SS – 2014 – Full Set
TOP
Bremont U2 SS – 2014 – Full Set
£2,000
Seller
Oakleigh Watches
20
UK
Rolex Sea-Dweller Deepsea D-Blue
TOP
Rolex Sea-Dweller Deepsea D-Blue
£12,500
Free shipping
Seller
Swiss Watch Trader
 
UK
Rolex Yacht-Master Midsize Steel/Gold with Blue Dial, Ref: 68623
TOP
Rolex Yacht-Master Midsize Steel/Gold with Blue Dial, Ref: 68623
£4,950
Free shipping
Seller
Tempvs Ltd
65
UK
Rolex Vintage Gold Silver Dial Bubbleback Oyster Perpetual 6085
TOP
Rolex Vintage Gold Silver Dial Bubbleback Oyster Perpetual 6085
£5,750
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
92
UK
Breitling Bentley Motors
TOP
Breitling Bentley Motors
£3,250
Seller
Kings Hill Jewellery
 
UK
Omega Seamaster Planet Ocean Co Axial 45.5mm  232.30.46.21.01.002
TOP
Omega Seamaster Planet Ocean Co Axial 45.5mm 232.30.46.21.01.002
£3,400
Free shipping
Seller
JPA Watch Company Ltd
16
UK
Omega Seamaster Diver 300M 'Commander'  212.32.41.20.0...
TOP
Omega Seamaster Diver 300M 'Commander' 212.32.41.20.0...
£3,550
Seller
The Watch Directory
46
UK
Rolex Datejust 116234 - 2011 B&P
TOP
Rolex Datejust 116234 - 2011 B&P
£4,450
Seller
Tempo and Time Ltd
11
UK
Omega Seamaster Diver 300 M
TOP
Omega Seamaster Diver 300 M
£2,951
Seller
Swiss Time Traders
 
UK
Omega Seamaster Bullhead 225.12.43.50.01.001 - Unworn 2016
TOP
Omega Seamaster Bullhead 225.12.43.50.01.001 - Unworn 2016
£5,510
Free shipping
Seller
Mark Worthington Jewellers
23
UK
Rolex Day-Date ('President') Ref. 18238 in 18-ct...
Rolex Day-Date ('President') Ref. 18238 in 18-ct...
£10,500
Free shipping
Seller
Swiss Watch Shop Ltd.
 
UK
Omega Vintage Speedmaster, Straight Writing
TOP
Omega Vintage Speedmaster, Straight Writing
£5,500
Free shipping
Seller
Tempvs Ltd
65
UK
Rolex 18k R/G Rare Chronometer Dial Precision Vintage Gents 4134
TOP
Rolex 18k R/G Rare Chronometer Dial Precision Vintage Gents 4134
£12,500
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
92
UK
Omega Seamaster Planet Ocean
Omega Seamaster Planet Ocean
£2,850
Seller
Market Cross Jewellers
 
UK
Omega Seamaster Planet Ocean Gmt 232.30.44.22.03.001
TOP
Omega Seamaster Planet Ocean Gmt 232.30.44.22.03.001
£4,295
Free shipping
Seller
JPA Watch Company Ltd
16
UK
Chopard L.U.C Tourbillon Heritage 161911-9001 RRP £152,800 Ltd Ed
TOP
Chopard L.U.C Tourbillon Heritage 161911-9001 RRP £152,800 Ltd Ed
£35,000
Seller
The Watch Directory
46
UK
Rolex Daytona Steel/Gold Rolesor Champagne Diamond
TOP
Rolex Daytona Steel/Gold Rolesor Champagne Diamond
£10,968
Seller
Juwelier Burger, since 2001
465
NL
Omega Seamaster Planet Ocean
TOP
Omega Seamaster Planet Ocean
£2,200
Seller
Swiss Time Traders
 
UK
Rolex Datejust
TOP
Rolex Datejust
£4,790
Seller
Private Seller
 
UK
Rolex Submariner Date Ref. 16613 — Stunning in Black and...
Rolex Submariner Date Ref. 16613 — Stunning in Black and...
£6,450
Free shipping
Seller
Swiss Watch Shop Ltd.
 
UK
Rolex Sea-Dweller Unworn 50th Anniversary
TOP
Rolex Sea-Dweller Unworn 50th Anniversary
£11,550
Free shipping
Seller
MASTROLORENZI S.A.S DI MATTIA MASTROLORENZI & CO.
49
IT
Rolex Vintage UAE Air Force Pepsi Bezel GMT-Master B&P 1675
Rolex Vintage UAE Air Force Pepsi Bezel GMT-Master B&P 1675
£95,000
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
92
UK
Rolex Explorer II
Rolex Explorer II
£3,700
Seller
Market Cross Jewellers
 
UK
Rolex Explorer I SEL scat/gar art. Re775
TOP
Rolex Explorer I SEL scat/gar art. Re775
£3,671
Seller
Stroppiana SRL
229
IT
F.P.Journe Resonance Brass Movement Platinum 38mm
F.P.Journe Resonance Brass Movement Platinum 38mm
£34,000
Free shipping
Seller
A Collected Man
6
UK
Omega Speedmaster “Grey Side of the Moon Meteorite” Co-axial
Omega Speedmaster “Grey Side of the Moon Meteorite” Co-axial
£7,750
Free shipping
Seller
ChronoEdge
78
UK
Omega Speedmaster HB-SIA
TOP
Omega Speedmaster HB-SIA
£3,800
Seller
Swiss Time Traders
 
UK
Rolex Sea-Dweller Deepsea
TOP
Rolex Sea-Dweller Deepsea
£10,500
Seller
Private Seller
 
UK
Rolex Day-Date 118238 in 18-ct Gold — Virtually-Like-New
Rolex Day-Date 118238 in 18-ct Gold — Virtually-Like-New
£13,750
Free shipping
Seller
Swiss Watch Shop Ltd.
 
UK
Omega Seamaster Planet Ocean Chronograph
Omega Seamaster Planet Ocean Chronograph
£4,195
Seller
Time Piece Trader Ltd
 
UK
Rolex S/S O/P Very Rare Silver Baton Dial Vintage Milgauss 1019
Rolex S/S O/P Very Rare Silver Baton Dial Vintage Milgauss 1019
£18,500
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
92
UK
Rolex Vintage Oyster Perpetual Datejust Ref.1600 / 36 mm / 1972
TOP
Rolex Vintage Oyster Perpetual Datejust Ref.1600 / 36 mm / 1972
£3,223
Free shipping
Seller
VintageCaliber GmbH
32
DE
Rolex 16800 Submariner Date - Transitional Model Full Set
Rolex 16800 Submariner Date - Transitional Model Full Set
£9,700
Free shipping
Seller
Watch Club
13
UK
Rolex Datejust acc-oro Diamanti SCAT/GAR art. Rz1251
TOP
Rolex Datejust acc-oro Diamanti SCAT/GAR art. Rz1251
£4,253
Seller
Stroppiana SRL
229
IT
Rolex Submariner Date
TOP
Rolex Submariner Date
£4,995
Free shipping
Seller
M J GILLAN LTD
UK
Omega Seamaster Planet Ocean
TOP
Omega Seamaster Planet Ocean
£2,695
Seller
Swiss Time Traders
 
UK
Rolex Day-Date
Rolex Day-Date
£24,950
Seller
Market Cross Jewellers
 
UK
Omega Speedmaster Date 32105100 — Striking UNWORN 'Reverse...
Omega Speedmaster Date 32105100 — Striking UNWORN 'Reverse...
£2,750
Free shipping
Seller
Swiss Watch Shop Ltd.
 
UK
Omega Seamaster Chronograph Black Dial Ref. 213.30.42.40.01.001
Omega Seamaster Chronograph Black Dial Ref. 213.30.42.40.01.001
£2,238
Free shipping
Seller
Watch Center London
442
UK
Rolex Daytona Gents Vintage Steel
Rolex Daytona Gents Vintage Steel
£69,500
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
92
UK
Omega Constellation Chronometer
TOP
Omega Constellation Chronometer
£919
Seller
Vintage Watch Services
144
NL
Rolex Sea-Dweller
Rolex Sea-Dweller
£10,950
Seller
Global Watch Shop
UK
Panerai Luminor Chrono
TOP
Panerai Luminor Chrono
£4,500
Seller
Private Seller
 
UK
Rolex Datejust II Weißgold Oyster Klassiker blue roman Dial...
TOP
Rolex Datejust II Weißgold Oyster Klassiker blue roman Dial...
£5,550
Seller
Uhrenkapital
211
DE
Rolex Explorer I 114270 Never polished
TOP
Rolex Explorer I 114270 Never polished
£3,939
Free shipping
Seller
MASTROLORENZI S.A.S DI MATTIA MASTROLORENZI & CO.
49
IT
Breitling Avenger Blackbird
Breitling Avenger Blackbird
£2,795
Seller
Market Cross Jewellers
 
UK
Rolex Lady-Datejust 179174 with Mother of Pearl Dial
Rolex Lady-Datejust 179174 with Mother of Pearl Dial
£4,750
Free shipping
Seller
Swiss Watch Shop Ltd.
 
UK
Omega De Ville Co-Axial Special Edition St Moritz
Omega De Ville Co-Axial Special Edition St Moritz
£2,685
Free shipping
Seller
Watch Center London
442
UK
Rolex 18k Y/G O/P Rare Lapis Lazuli Dial Day-Date 18238
Rolex 18k Y/G O/P Rare Lapis Lazuli Dial Day-Date 18238
£17,500
Free shipping
Seller
Watches & Jewellery of Bond Street Ltd
92
UK
Rolex Datejust 41 Steel & Gold 126334(All Factory stickers...
Rolex Datejust 41 Steel & Gold 126334(All Factory stickers...
£6,595
Free shipping
Seller
ChronoEdge
78
UK
Omega Constellation Double Eagle 1503.30.00
Omega Constellation Double Eagle 1503.30.00
£1,699
Free shipping
Seller
Watches of Japan
 
UK
Breitling Navitimer 01 Limited Edition
TOP
Breitling Navitimer 01 Limited Edition
£5,995
Seller
Private Seller
 
UK
Rolex Datejust Day Date ref. 118239 06/2003 art. Rw910
TOP
Rolex Datejust Day Date ref. 118239 06/2003 art. Rw910
£15,668
Seller
Stroppiana SRL
229
IT
F.P.Journe Chronometre Optimum 40 mm platinum Cal. 1510
F.P.Journe Chronometre Optimum 40 mm platinum Cal. 1510
£46,000
Free shipping
Seller
A Collected Man
6
UK
Chopard Mille Miglia GTS Chrono
Chopard Mille Miglia GTS Chrono
£4,396
Free shipping
Seller
WatchesofMayfair.com
234
UK

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.