OMEGA REF. 105.012 SPEEDMASTER
PROFESSIONAL STEEL
Omega, Speedmaster Professional, No.22826408, Ref. 105.012-
65. Made circa 1965.
Fine and rare, water-resistant, stainless steel wristwatch with
round button chronograph, 12-hour and 30-minute registers
and tachometer.
Three-body, polished and brushed, integral crown and pusher
guard, black bezel with tachometer scale to 500 UPH, lyre
lugs, screw- down case back with Speedmaster logo, antimagnetic
protection cap.
Black with luminous painted baton indexes, outer 1/5th
second divisions, subsidiary dials for the seconds, the 12-hour
and 30-minute registers. Luminous white baton hands.
Cal. 321, copper-colored, 17 jewels, straight-line lever
escapement, monometallic balance, shock absorber, self-compensating
flat balance spring, index regulator.