18 ct yellow gold. Fixed bezel, with engraved tachymetric scale, in 18 ct yellow gold
Centre hour, minute and seconds hands, small seconds hand at 6 o'clock. Chronograph (centre hand) accurate to within 1/8 of a second, 30-minute counter at 3 o'clock and 12-hour counter at 9 o'clock. Stop seconds for precise time setting.
Automatic. Power reserve 72 hours