Mark 4. 5 Omega “Speedmaster, Automatic”, movement N°9199654, Ref. ST 176. 0012. Made in 1975. Fine and rare, self-winding, water-resistant, tonneau-shaped, stainless steel wristwatch with day, date, round button chronograph, 12-hour register, central minute recorder, tachometer, the 24 hours with night/day indication, and a stainless steel Omega bracelet with deployant clasp. Accompanied by the instruction booklet and a recent Omega box.
- USD1 300 - 2 100
- EUR1 000 - 1 700
- CHF1 500 - 2 500
- CHF 1 800
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C. Three-body, (patent CH 508. 925) brushed and polished, screw-down case back with the embossed “Seamaster” logo, hooded lugs, tachometer scale graduated to 500UPH reverse-painted on the sapphire crystal. D. Black with luminous baton indexes, inner Arabic five minutes, outer minute/fifth second scale, subsidiary dials for the seconds and the 12-hour register, the 24 hours with night/day indication by means of an arrow on a revolving disc, 60-minute register by means of a central white jet hand, apertures for the day and date. Luminous white baton hands. M. Cal. 1045, copper colored, 17 jewels, straight line lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring, index regulator, hack mechanism. Dial, case and movement signed. Dim. 42 x 45 mm. Thickness 15 mm. Approx overall length 170 mm.