OMEGA Seamaster Chrono-Tachometer Yachting rare gents wristwatch reference 176.010, Switzerland around 1973, self winding, unpolished stainless steel case including original bracelet with deployant clasp reference 1162, dark blue dial with silvered raised hour-indices, 200 to 60 km/h colour differentiated Tachometerscale, starting with 15-minutes scale, 60-minutes-counter from the middle, 12-hour-counter at 6, constant second & 24-hour-display at 3, date, copper coloured movement calibre 1040, 22 jewels, precision adjustment, diameter approx. 43 mm, length approx. 20,5 cm, overhaul recommended at buyer's expense, rotor mass & fitting ring slightly corroded, condition 2-3, s. literature 'Omega, Reise durch die Zeit' written by Marco Richon, page 551