Swiss indirect centre seconds lever dress watch Circa 1925

Gold keyless lever with indirect centre seconds by Vacheron & Constantin
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A very fine Swiss 18 carat gold indirect centre seconds keyless lever dress watch, made in the 1920’s. Made for J.E. Caldwell & Co., Philadelphia. Rhodium plated movement, 19 jewels, wolf’s tooth winding, straight-line lever escapement, cut bimetallic compensation balance with timing screws, 8 adjustments, blued steel Breguet balance spring, swan neck micrometer regulator. Brushed silver dial with applied gold Breguet numerals, outer minute track with fifths of a second divisions and Arabic five minute numerals, gold cathedrale hands. Polished case, curved bezel, semi concealed hinge. Movement signed Vacheron & Constantin, dial, case and movement signed J.E. Caldwell, Philadelphia, case numbered.
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Diameter: 46 mm
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Signed: J.E. Caldwell & Co – Vacheron & Constantin Genève