It needed to be able to move 12 lines, and have a -4/+4 accuracy with hacking. It needed to be waterproof up to 20 feet. It have a Faraday/anti-magnetic cage, hence the iron dial. To prevent crystal from slipping during compression, a screw was required to secure it.
Panerai Luminor Replica Watches and IWC were both able to answer the call, but eventually JLC was dropped as a supplier due to the fact that the brand didn't incorporate a shock absorption mechanism into its movements. The IWC Mark 11 watch was born. It was distributed to various branches of RAF starting in 1949. It was the Caliber.
IWC Mark 11
All watches were subject to regulation at the Greenwich observatory.Panerai Luminor Replica Watches They had to be tested there each year. The iconic diamond-shaped index at 12 o’clock was added to the dial in 1952. From 1949 to 1981, IWC supplied the RAF with the Mark 11, and was the sole supplier in the early '60s.
1957 -- The Rolex MilSub
There is also the Rolex MilSub. Rolex's relationship with the Royal Navy began in 1957, when the Ministry of Defence was given a Big Crown Submariner named the A/6538. The timepiece was worn by Commander James Bond, Sean Connery, an ex-navy officer. It had soldered spring bars and a nylon NATO strap. A special bezel with a serrated edge could be used with gloves. These watches were only 21 pieces in the initial order.
Rolex ref. A/6538
The 5513 and 5517 crown guard models replaced the Big Crown Submariner. These watches are distinguished from civilian watches because of their fixed spring bars, dials stamped by the T logo,omega replica which refers to radioactive tritium, special hour hand with a sword-shaped shape, bezels with full 60 minute markers to better read dive time, and dials that have the T logo. The dials of both the Panerai Luminor Replica Watches and Mark 11 had the Ministry of Defence's Broad Arrow logo, but MilSubs have a very similar logo on their casebacks.
1973 -- From Smiths to Hamilton: The W10
The Smiths W10 watch was created concurrently with both the Mark 11 and MilSub. It was the British Army's true workhorse, perhaps. The Ministry of Defence approached Smiths in the 1960s to make a handsome, reliable watch. Smiths was an industrial conglomerate that is well-known for making the gauges on British performance cars.
Smiths W10 was born. Smiths was already known for its reliability, as Sir Edmund Hilary wore it on his wrist while climbing Everest in 1953. Sherpa Tenzig Nyang Norgay was the one wearing the Rolex Explorer's precursor. The Ministry of Defence needed to find another supplier, so the Hamilton watch company was chosen.
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