Important Modern & Vintage Timepieces

Hong - Kong, Oct 09, 2010

LOT 19

Omega Mark 4.5 Omega, ?Speedmaster, Automatic?, movement No. 39203172, Ref. ST 1760012. Made in December 13th, 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 deployant clasp. Accompanied by a modern Omega box, certificate and copy of the service paper dated October 2008.

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 painted 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, selfcompensating flat balance spring, index regulator, hack mechanism. Dial, case and movement signed. Dim. 42 x 45 mm. Thickness 15 mm.