Reference: 1-915. Valjoux 7751 calibre. Functions: hours, minutes, seconds, chronograph, calendar, moon phases. Case: oversize knurled, 18 kt gold plated. Bezel: knurled. Crown: original, 'priest's skull cap' style. Buttons: push buttons. Lugs: tilting. Dimensions: 40 mm excluding crown, 54 mm at the lugs. Crystal: sapphire. Case back: screw-down customised by the company, with sapphire crystal and exhibition movement. Dial: silvered, with guilloché pattern, Roman numerals with gold-plated dots, pointed hands, continuous seconds at 9 o'clock, chronograph minutes at 12 o'clock, chronograph hours at 6 o'clock, days of the week and months of the year in double window at 12 o'clock, moon phases at 6 o'clock, 24-hour indicator at 9 o'clock, date display with central hand with red half-moon at the end, chronograph seconds at the centre, scale with 1/5 of a second markers, tachymetric scale on rehaut, logo at 3 o'clock; quick-set function in crown with push button at 10 o'clock, on the case. Generic leather strap. Clasp: generic. The watch is in very good condition, is in perfect working order and is precise and reliable. It is original and serviced.