Ulysse Nardin. An unusual silver openface keyless lever deck chronometer with Guillaume balance, up and down indicator, break circuit, original Bulletin de Marche, cables and wooden boxes

Ulysse Nardin. An unusual silver openface keyless lever deck chronometer with Guillaume balance, up and down indicator, break circuit, original Bulletin de Marche, cables and wooden boxes
Signed Ulysse Nardin, Locle, Suisse, Chronometre, movement no. 122890, case no. 647775, circa 1950
Cal. 24''' gilt-finished fully jewelled lever movement, Guillaume balance with gold poising screws, cam wheel regulator, the escape wheel pinion fitted with a cam for contact-breaking each second, silver cuvette, the white enamel dial with large Roman numerals, blued steel spade hands, two subsidiary dials indicating 36 hours power reserve and constant seconds, in large circular case with hinged back, a sliding lever to activate the circuit-breaking and transmitting pin in the band, large ball-form crown, in three-tier lacquered mahogany box numbered 122890 with integrated power supply and conductors, outer wooden box numbered 122890 with lock and leather strap, case, cuvette, dial and movement signed and numbered
64 mm. diam.