The Omega Speedmaster Mark II reference 145.014 was introduced in 1969 as a modernised Speedmaster Professional. It has a stainless steel tonneau case measuring 41.7 x 45.5 x 15 mm with shrouded lugs and a flat, anti-reflective mineral crystal, a screw-down case back and 60 m (6 bar) water resistance. The tachymeter scale is printed under the crystal. It is powered by the hand-wound calibre 861, the same movement as the Speedmaster Professional of the period. Two dials share the reference: a black triple-register dial and, from 1970, the grey “Racing” dial with orange chronograph hands. It matters as the first sequel to the Moonwatch.

The Mark II was made from 1969 to 1975. Its case is linked to Omega‘s late-1960s pilot’s watch experiments, such as the Flightmaster. The Alaska Project prototypes for NASA were reworked to use the Mark II case after feedback from NASA engineer James H. Ragan, and one Alaska watch sold at Phillips in 2018 for CHF 193,750. The Racing dial inspired the 2004 Speedmaster Professional Japan Racing.

Collectors have long treated the Mark II as overlooked, mainly because of the case shape, though owners praise its comfort. Fratello reported prices below 2,000 euros in 2015 and 2016, with black dials starting around 2,000 euros and Racing dials closer to 3,000 euros or more. Common issues are over-polished cases and Racing dials faded by heat or sun. The original reference is no longer produced. Omega released a re-edition in 2014 with the Co-Axial calibre 3330.