Omega. A Rare Stainless Steel Chronograph Wristwatch

Model: Speedmaster Professional with Tropical dial

Reference: 145.012-67 SP

Circa: 1967

Case. Three-body, polished and brushed, screwed-down case back engraved with the Speedmaster logo, anti-magnetic protection cap, tachometer graduation on the black bezel to 500 UPH, lyre lugs, hesalite crystal. From Huguenin Frères SA

Dial Deep Chocolate Brown with  baton indexes losing most of its luminous like most tropical dials, outer 1/5th seconds track, subsidiary dials for the seconds, the 12-hour and 30-minute registers. Luminous white baton hands.

Movement. Cal. 321, copper-colored, 17 jewels, straight-line lever escapement, monometallic balance with timing screws, shock absorber, self-compensating Breguet balance spring, index regulator. Mvt Nr. 26543XXX

Size: 42mm

More about Omega:

The present watch is a mint example of a Speedmaster Professional reference 145.012. Featuring the “pie-pan” dial that has a clear step from the outer minute division ring, it has a gorgeous Tropical dial. The Chocolate brown  dial is complimented by the loss of the luminous  on the markers, which have now gained a contrasting white shade matching the baton hands. The lugs feature sharp facets and the crisp case back logo engraving add to the desirability of this example.  The more common  "Tropical" Speedmaster is the ref 145.022 with a pre-moon back but a 861 movement. A Tropical 145.012 speedmaster is a  much rarer watch, this combo of the calibre 321, earlier reference and brown dial will be enjoyed by a collector for years to come.