Case:Two-body, screwed-down case back and winding-crown, hooded lugs, sapphire crystal.Dial: Black with painted luminous baton indexes, subsidiary dials for the seconds, the 12-hour and 30-minute registers, outer 1/5th second/minute divisions, outermost tachometer graduation, aperture for the day and date. Luminous baton hands. Movement: Cal. Lemania 5100, rhodium plated, 17 jewels, straight- line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring, hack mechanism.Dial, case and movement signedDim: 41x 46 mm Thickness: 15 mmdial, case and movement in good condition, glass slightly damaged.