OMEGA SPEEDMASTER MARK II RACING STEEL
Omega, "Speedmaster Professional, Mark II", Ref. ST 145.014. Made in 1970.
Fine and rare, tonneau-shaped, water-resistant, stainless steel wristwatch with round-
button chronograph, registers, tachometer and a stainless steel Omega link bracelet
with deployant clasp.
Two-body, solid, polished and brushed, screw-down case back with Speedmaster
logo, tachometer scale graduated to 500 UPH reverse-painted on the sapphire crystal.
Black with painted luminous baton indexes, outer minute/seconds and 1/5th
seconds divisions in white and orange, subsidiary dials for the constant seconds, the
30-minute and 12-hour registers. Luminous white baton hands, orange hand for the
chronograph function.
Cal. 861, copper-colored, 17 jewels, straight-line lever escapement, monometallic
balance, shock absorber, self-compensating flat balance spring, micrometer regulator.