Swiss stainless steel open faced lever watch with alarm Circa 1920

Stainless steel keyless lever by Longines
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A fine and unusual Swiss stainless steel open faced keyless lever pocket watch with alarm, circa 1920. Rhodium-plated movement, Geneva striping decoration, 17 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Stainless steel hinged cuvette. Silvered dial with luminous Arabic numerals, outer minute track, guilloché subsidiary dials for the seconds at 6 and the alarm setting at 12, original blued steel luminous baton hands. Polished case. Dial, case and movement signed and numbered.
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Diameter: 50.5 mm
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Signed: Longines