Omega Ref. 105.012

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. Notes Dial, case and movement signed. DIAM. 42mm. THICKNESS 14mm. Approx. overall length 185 mm.