OMEGA SPEEDMASTER MARK II RACING STEEL
Omega, "Speedmaster Professional, Mark II", No. 28088451, Ref. ST 145.014. Made circa 1970.
Fine, tonneau-shaped, stainless steel wristwatch with round button chronograph, registers,
tachometer and a stainless steel Omega link bracelet with deployant clasp.
Two-body, polished and brushed, inclined bezel, hooded lugs, screw-down case back with
Speedmaster logo, flat sapphire crystal with black tachometer scale.
Grey/red with painted luminous baton indexes, sunk subsidiary dials for the constant
seconds, the 12-hour and 30-minute registers, outer minute/seconds and 1/5th seconds divisions.
Luminous white baton hands.
Cal. 861, copper colored, 17 jewels, straight-line lever escapement, monometallic balance,
shock absorber, self-compensating flat balance spring, index regulator.