The Art of American Horology Part ll,...

Roosevelt Hotel, Madison Avenue @ 45th Street, Dec 04, 2002

LOT 11

Omega, "Speedmaster Professional", No. 28428757, case No. 145022, circa 1969. Production of the Speedmaster started in 1957.Fine, water-resistant, stainless steel gentleman's wristwatch with round button chronograph, registers, tachometer and a stainless steel Omega bracelet.

C. three-body, polished and brushed, screwed-down case back with logo, anti-magnetic protecting cap, tachometer graduation on the bezel, stylized lapidated lugs. D. black with tritium-coated indexes, auxiliary dials for the seconds, the 12 hour and 30 minute registers. "Bâton" tritium-coated hands. M. Cal. 861, gilt brass, 17 jewels, straight line lever escapement, monometallic balance, shock-absorber, self-compensating flat balance-spring.Dial, case and movement signed.Diam. 42 mm. Approx. overall length: 180 mm.