Swiss stainless steel watch with power reserve Circa 1960

Stainless steel watch by Ulysse Nardin
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A fine stainless steel keyless deck lever chronometer with power reserve indication and dead seconds electrical contacts. Accompanied by the original dual case wooden wall mounting box for electrical connection and a Bulletin de Marche dated October 1960. Made by Ulysse Nardin, Locle, Suisse Circa 1960.
Four body, massive, bassine et filets and polished case with screw down back with milled border. Silver dial with Roman numerals, sunk subsidiary seconds and up and down scale and blued steel spade hands.
Frosted and gilt movement with 23 jewels, straight-line lever escapement, brass invar Guillaume balance, eight adjustments, blued steel balance spring with terminal curve and special micrometric index regulator.
Signed on the dial, case and movement and boxes.
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Diameter: 64 mm
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Signed: Ulysse Nardin, Locle Suisse
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Sidereal deck chronometers were vital for navigation. The present lot includes the double wooden box clearly labelled with the movement number and the original Bulletin de Marché.