Swiss Staybrite stainless steel keyless lever pocket watch Circa 1950

Staybrite stainless steel keyless lever by Omega
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A fine and rare Swiss Staybrite stainless steel keyless lever pocket watch, circa 1950. Rhodium-plated movement, 15 jewels, non magnetic straight line lever escapement with brass pallet fork and escape wheel, monometallic balance, Breguet balance spring, index regulator. Two tone brushed silver dial with painted Arabic numerals, outer minute track, outermost Arabic five minute numerals, guilloché subsidiary seconds dial and original blued steel baton hands. Polished case. Dial, case and movement signed case and movement numbered.
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Diameter: 50.5 mm
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Signed: Omega non magnetic