Fine Swiss nickel open faced keyless lever watch Circa 1980

Nickel lever pocket watch by Ulysse Nardin
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A fine Swiss nickel open faced keyless lever pocket watch, circa 1980. Rhodium plated movement, 19 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring with terminal curve, swan neck micrometric regulator. White enamel dial with blue Roman numerals, outer minute track, subsidiary seconds and original blue lacquered spade hands. Plain case, transparent to the back. Dial and movement signed.
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Diameter: 57 mm
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Signed: Ulysse Nardin