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·Recently we had an interesting thread about early Conquest 1954 which was marked as "waterproof"
Longines was a pacemaker with the production of waterproof watches. (for example first waterproof chronograph Ref. 4270 "mushroom" in 1937.
This led me to the question, when did Longines produce its first waterproof automatic wristwatch and which models were these?
The earliest "waterproof" manual wind examples of wristwatches from Longines date back to around 1919 when Baume GB used screw down silver cases.
The first Automatic wristwatch from Longines was serial 6.999.999 a prototype watch - not for resale - from 1945 - Cal. 22A
Of course Longines produced the legendary Skin diver "Nautilus 6921" in 1959.
But which watches were the first waterproof automatics from Longines? I guess they are in between 1952 and 1959?
During this period Longines marked case backs with different motives like fish and others. Some waterproof watches were still snap back, others screw back.
Longines was a pacemaker with the production of waterproof watches. (for example first waterproof chronograph Ref. 4270 "mushroom" in 1937.
This led me to the question, when did Longines produce its first waterproof automatic wristwatch and which models were these?
The earliest "waterproof" manual wind examples of wristwatches from Longines date back to around 1919 when Baume GB used screw down silver cases.
The first Automatic wristwatch from Longines was serial 6.999.999 a prototype watch - not for resale - from 1945 - Cal. 22A
Of course Longines produced the legendary Skin diver "Nautilus 6921" in 1959.
But which watches were the first waterproof automatics from Longines? I guess they are in between 1952 and 1959?
During this period Longines marked case backs with different motives like fish and others. Some waterproof watches were still snap back, others screw back.
