Fine Swiss stainless steel open faced chronograph Circa 1941

Stainless steel lever pocket watch
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A fine and extremely rare Swiss stainless steel open faced keyless pocket watch with chronograph made by Omega in Bienne, circa 1941. Plain Lépine case. Black dial with Arabic hour numerals, a minute track with fifth of a second divisions and Arabic five minute markers, subsidiary seconds at 6 o’clock, a 30 minute counter at 12, tachometer, telemeter and pulsometer scales and syringe hands. The movement has a lever escapement with 17 jewels. Signature on the dial, case and movement.
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Diameter: 50 mm
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Signed: Ω Omega Bienne
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Accompanied by an Extract from the Archives.