CASE: Three body, polished, inverted bezel, curved lugs, screwed down crown, transparent case back with 6 screws, sapphire crystals.DIAL: Black with applied steel radial Roman numerals and dart quarters, subsidiary dials for the seconds, 30 minute and 12 hours registers, inner minute/second divisions, outer tachometer scale, double apertures for the big date at 12. Steel Dauphine hands.MOVEMENT: Cal. E/J 8150, rhodium plated, Oeil de Perdirx decoration, 28 jewels, straight line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring, decorated rotor, hack mechanism. Dial, case and movement signed in very good condition. DIAM: 41 mm. THICKNESS: 15 mm.