Diving watch

dive watchdiver's watchdiving watchesdive watchesdiver's watchesDivers' watchestimer
A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 10 atm, the equivalent of 100 m.wikipedia
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Dive computer

diving computerdive computersDecompression computer
To a large extent the diver's watch has been superseded by the personal dive computer, which provides an automatically initiated dive timer function along with real-time decompression computation and optionally other functions.
As the dive computer automatically measures depth and time, it is able to warn of excessive ascent rates and missed decompression stops and the diver has less reason to carry a separate dive watch and depth gauge.

Blancpain

Blancpain companyBlancpain S. A.
In 1953, Lip-Blancpain's Fifty Fathoms waterproof watch came on the market in France.
It is particularly noted for its Fifty Fathoms diving watch introduced in 1953 and its 1735 Grande Complication wristwatch introduced in 1991.

Rolex Sea Dweller

Rolex Sea-Dweller 2000Sea Dweller
This led to the development of the first 'ultra water resistant' watches like the Rolex Sea-Dweller 2000 (2000 ft = 610 m), that became available in 1967, and was produced in several variations, and the Omega Seamaster Professional 600m/2000 ft, also known as the " Omega PloProf" (Plongeur Professionnel), that became available in 1970, and was produced in several variations.
The Rolex Oyster Perpetual Date Sea-Dweller is a line of diver's watches manufactured by Rolex, with an underwater diving depth rating of 610 m for the vintage models and up to 3,900 metres (12,800 ft) for the Sea-Dweller DEEPSEA model.

Frogman

frogmencombat diverscombat diver
Various models were issued by Blancpain in small quantities to the military in several countries, including US and French Navy combat diver teams.
For this new way of underwater diving, the Italian frogmen trained in La Spezia, Liguria, using the newly available Genoese free diving spearfishing equipment; diving mask, snorkel, swimfins, and rubber dry suit, the first specially made diving watch (the luminescent Panerai), and the new A.R.O. scuba unit.

Watch

wristwatchwatchesdigital watch
A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 10 atm, the equivalent of 100 m. The typical diver's watch will have a water resistance of around 200 to 300 m, though modern technology allows the creation of diving watches that can go much deeper.
These watches are sometimes called diving watches when they are suitable for scuba diving or saturation diving.

Helium release valve

helium escape valverelease or escape valve
Some diving watches intended for saturation diving at great depths are fitted with a helium or mixed breathing gas release or escape valve to prevent the crystal from being blown off by an internal pressure build up caused by helium that has seeped into the watch case in helium enriched environments (helium atoms are the smallest natural gas particles found in nature) as the watch and diver adjust to normal atmospheric conditions.
A helium release valve, or helium escape valve, as it is also called, is a feature found on some diving watches.

Era Watch Company

Edox
In 1961, Edox launched the Delfin line of watches, with industry-first double case backs for water resistance to 200 meters.
The manufacture also produces diving watches for UIM Class 1.

Shock-resistant watch

shockShock resistanceshock resistant
Shock resistance. This is tested by two shocks (one on the 9 o'clock side, and one to the crystal and perpendicular to the face). The shock is usually delivered by a hard plastic hammer mounted as a pendulum, so as to deliver a measured amount of energy, specifically, a 3 kg hammer with an impact velocity of 4.43 m/s. The change in rate allowed is ± 60 seconds/day.
Diving watch

Water Resistant mark

water resistancewater resistantWater resistant watch
A true contemporary diver's watch is in accordance with the ISO 6425 standard, which defines test standards and features for watches suitable for diving with underwater breathing apparatus in depths of 100 m or more.
The test for qualifying a diving watch for repeated usage in a given depth includes safety margins to take factors into account like aging of the seals, the properties of water and seawater, rapidly changing water pressure and temperature, as well as dynamic mechanical stresses encountered by a watch.

Underwater diving

divingdiversdiver
A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 10 atm, the equivalent of 100 m. The typical diver's watch will have a water resistance of around 200 to 300 m, though modern technology allows the creation of diving watches that can go much deeper.

Waterproofing

waterproofwatertightwater-resistant
A diving watch, also commonly referred to as a diver's or dive watch, is a watch designed for underwater diving that features, as a minimum, a water resistance greater than 10 atm, the equivalent of 100 m. The typical diver's watch will have a water resistance of around 200 to 300 m, though modern technology allows the creation of diving watches that can go much deeper.

Standard diving dress

standard divingdiving suithard hat divers
Hard hat divers of that period sometimes placed common pocketwatches on the inside of their helmets in order to know the time spent under water.

Pocket watch

pocketwatchfob watchwatch fob
Hard hat divers of that period sometimes placed common pocketwatches on the inside of their helmets in order to know the time spent under water.

Rolex

TudorOyster DateRolex Australia
In 1926, Rolex bought the patent for the “Oyster” watch case, featuring a hermetic seal.

Mercedes Gleitze

On 7 October 1927 an English swimmer, Mercedes Gleitze attempted to cross the English Channel with a new Rolex Oyster hanging round her neck by a ribbon on this swim.

Omega SA

OmegaOmega WatchesOmega brand
Omega SA is credited as the creator of the world's first industrially produced diving watch intended for commercial distribution, the rectangular Omega "Marine" with a patented double sliding and removable case, introduced in 1932.

Regia Marina

Italian NavyRoyal Italian NavyItalian Royal Navy
Following a request made by the Royal Italian Navy, in September 1935, for a luminous underwater watch for divers, Panerai offered "Radiomir" underwater timepieces in 1936.

Panerai

Officine Panerai
Following a request made by the Royal Italian Navy, in September 1935, for a luminous underwater watch for divers, Panerai offered "Radiomir" underwater timepieces in 1936.

Hamilton Watch Company

HamiltonBurenHamilton 500
In addition, a large number of "canteen" style dive watches by Hamilton, Elgin or Waltham were made to military specification during and after World War II.

Waltham Watch Company

WalthamBoston Watch CompanyWaltham Watch Factory
In addition, a large number of "canteen" style dive watches by Hamilton, Elgin or Waltham were made to military specification during and after World War II.

World War II

Second World WarwarWWII
In addition, a large number of "canteen" style dive watches by Hamilton, Elgin or Waltham were made to military specification during and after World War II.

Jacques Cousteau

Jacques-Yves CousteauCousteauCousteau Society
The Fifty Fathoms was worn by Jacques Cousteau and his divers during the underwater film "Le monde du silence", which won the Palme d'or at the Cannes film festival in 1956, and in the US when TV star Lloyd Bridges wore a Blancpain Fifty Fathoms dive watch in a photo that appeared on the cover of the February 1962 edition of Skin Diver Magazine.

Palme d'Or

Golden PalmGrand PrixGrand Prix du Festival International du Film
The Fifty Fathoms was worn by Jacques Cousteau and his divers during the underwater film "Le monde du silence", which won the Palme d'or at the Cannes film festival in 1956, and in the US when TV star Lloyd Bridges wore a Blancpain Fifty Fathoms dive watch in a photo that appeared on the cover of the February 1962 edition of Skin Diver Magazine.

Cannes Film Festival

CannesCannes FestivalCannes International Film Festival
The Fifty Fathoms was worn by Jacques Cousteau and his divers during the underwater film "Le monde du silence", which won the Palme d'or at the Cannes film festival in 1956, and in the US when TV star Lloyd Bridges wore a Blancpain Fifty Fathoms dive watch in a photo that appeared on the cover of the February 1962 edition of Skin Diver Magazine.

Lloyd Bridges

LloydThe Lloyd Bridges Show
The Fifty Fathoms was worn by Jacques Cousteau and his divers during the underwater film "Le monde du silence", which won the Palme d'or at the Cannes film festival in 1956, and in the US when TV star Lloyd Bridges wore a Blancpain Fifty Fathoms dive watch in a photo that appeared on the cover of the February 1962 edition of Skin Diver Magazine.