Fine Swiss stainless steel lever chronograph watch Circa 1940

Stainless steel keyless watch with tachymeter
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A Swiss stainless steel open faced keyless chronograph pocket watch made by Lemania, circa 1940. The gilt Swiss lever movement with a cut and compensated bimetallic balance and column wheel chronograph. Black enamel dial with luminous Arabic hour numerals, a white outer minute track with fifth of a second divisions and Arabic five minute numerals, an outermost white tachymeter scale, 30 minute register at 12 o’clock, subsidiary seconds at 6, white sword hands with luminous inserts and a center chronograph hand. The polished case with a snap on back, and twin chronograph buttons at 11 and 1 o’clock. Dial and movement signed and numbered.