OMEGA SPEEDMASTER MARK III STEEL
Omega "Speedmaster Professional Mark III", Automatic, Ref. ST 176.0002.
Sold on November 13, 1972.
Fine and rare, large, self-winding, water-resistant, tonneau-shaped,
stainless steel gentleman's wristwatch with date, round button
chronograph, 12-hour register, central minute recorder, tachometer,
24-hours with night/day indication, and a stainless steel articulated Omega
bracelet with deployant clasp. Accompanied by the original instruction
Two-body, "Pilot-line", brushed, screwed-down case back with engraved
"Seamaster" logo, hooded lugs.
Satiné blue with faceted black painted indexes, luminous dots, inner
Arabic five minutes, outer minute/fifth second scale, outermost tachometer
scale graduated to 500UPH, 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 orange and
black central "jet" hand, aperture for the date. Luminous white "baton"
Cal. 1040, copper-colored, 17 jewels, straight line lever escapement,
monometallic balance, shock-absorber, self-compensating flat balance
spring, micrometer regulator.