Approx. Ø58,5mm, ca. 170g, guilloched silver case, Ulysse Nardin case punch, housing and work number equal to No.8600, high-fine anchor chronometer movement with Geneva stripes and fine regulation, also signed and numbered, signed, original enamel dial (cracklele in the edge area), tinted steel pointer, bezel labeled "CONTACT", next to it a slider and the two contacts to control electrical currents in seconds, good condition, manageable, an end of contact bent. The device for controlling electrical currents in the second cycle is usually only found in some marine chronometers. This device is extremely rare in pocket watches.