CASE: Three-body, polished and brushed, screwed down case back, push-buttons and crown, crown protected by the crown guard, tachometer graduation on the bezel to 400 units per hour, sapphire crystal.DIAL: Black with applied luminous white gold indexes, subsidiary silver ring dials for the seconds, the 12-hour and 30-minute registers, outer minute and seconds division. Luminous white gold baton hands.MOVEMENT: Cal.4130, rhodium-plated, 44 jewels, straight-line lever escapement, monometallic balance adjusted to 6 positions, shock absorber, self-compensating free-sprung Breguet balance spring, Microstella regulating screws, hack mechanism.Dial, case and movement signed, in good conditionDIAM: 40 mm THICKNESS: 13 mm