Omega 145.012 Pre moon Cal 321 Don bezel

OMEGA SPEEDMASTER PROFESSIONAL PRE-MOON REF. 145.012 Before the Moon landings, before NASA fame and before the Speedmaster became one of the most recognised watches in the world, there was the reference 145.012. Widely regarded as one of the most desirable Pre-Moon Speedmasters ever produced, the 145.012 represents the final evolution of the legendary calibre 321 era. It combines the iconic asymmetrical Professional case with the movement that established the Speedmaster's reputation for precision, durability and reliability under the most demanding conditions. This example is an exceptionally honest survivor and a watch that ticks many of the boxes seasoned collectors search for. The original stepped dial remains beautifully preserved, accompanied by its highly sought-after DON (Dot Over Ninety) bezel. Reference checks against the Omega Speedmaster reference literature confirm the originality of the watch's key components, resulting in a remarkably correct and highly collectible example. At its heart beats the legendary Omega calibre 321, the column-wheel chronograph movement that powered the Speedmasters worn during NASA's Gemini and Apollo programmes. This example is further distinguished by its rare OXG-marked balance, identifying it as an export-market watch and adding another layer of collectibility for dedicated Speedmaster enthusiasts. Adding further desirability, the watch retains its original 1116 bracelet with sought-after 30-marked end links, a detail often missing from examples that have spent decades in circulation. Recently serviced and supplied with a 2-year warranty, the watch is ready to be enjoyed while remaining a significant collector-grade example. The chronograph functions correctly, with a slight drag visible at the six o'clock hour recorder—a characteristic noted for complete transparency. Technical Details Brand: Omega Model: Speedmaster Professional Pre-Moon Reference: 145.012 Production Year: Circa 1967 Movement: Omega Calibre 321 Manual-Wind Column Wheel Chronograph Dial: Original Black Stepped Dial Bezel: Original DON (Dot Over Ninety) Tachymeter Bezel Case: Stainless Steel Asymmetrical Professional Case Bracelet: Original Omega 1116 Bracelet End Links: Original No. 30 End Links Crystal: Hesalite Case Size: 42mm Functions: Chronograph, Hours, Minutes, Small Seconds Special Features: Rare OXG Export-Market Balance Condition: Fully Serviced, Highly Original Example Warranty: 2-year warranty A highly original Pre-Moon Speedmaster combining a calibre 321 movement, DON bezel, OXG-marked balance and original 1116/30 bracelet—precisely the details that separate a good vintage Speedmaster from a truly exceptional collector's piece.