Omega, a gentleman's stainless steel chronograph wristwatch, Speedmaster Professional mark IV, circular black dial, painted luminescent baton numerals, date aperture, three registers, tonneau-shaped case with raised black bezel calibrated for tachometer, two round chronograph pushers, screw back, case, dial and bracelet signed, articulated stainless steel bracelet with folding clasp. Width 4.4 cm.