CASE: Three body, polished and brushed, steel bezel with tachometer scale to 300 UPH, case back with Speedmaster logo.DIAL: Mother of- pearl with luminous Arabic numerals and diamonds indexes, outer minutes/seconds divisions, subsidiary dials for the seconds, the 12-hour and 30- minute registers. Luminous steel baton hands.MOVEMENT: Cal. 3220, rhodium-plated, 25 jewels, straight-line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring. Dial, case and movement signed, in good conditionDIAM: 39 mm THICKESS: 12 mm