C. Three body, solid, polished and brushed, curved lugs, inclined bezel, soft iron gilt metal antimagnetic lining, snap on case back. D. Pink with pink gold Arabic numerals, outer 1/5th second track with 5 minute/seconds Arabic markers, outer tachometer scale, subsidiary guilloche dials for the seconds and 30 minutes register. Pink gold Alpha hands. M. Rhodium plated, straight line lever escapement, monometallic balance, selfcompensating fl at balance spring, index regulator. Dial signed. Diam. 37.5 mm. Thickness 12 mm.