Important Collectors’ Watches, Pocket...

Geneva, Oct 14, 2007

LOT 46

So-called ?Mark 4.5? Omega ?Speedmaster, Automatic?, No.39203172, Ref. ST 176.0012. Made in 1977. 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 ?Shark? bracelet with ?Flip-in? clasp.

C. Three-body, (patent CH 508.925) polished and brushed, 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, (patent CH 508.831) copper-colored, 17 jewels, straightline lever escapement, monometallic balance, shock-absorber, self-compensating flat balance spring, micrometer regulator. Dial, case and movement signed. Dim. 42 x 45 mm. Thickness 15.5mm.