Omega Speedmaster Professional Moonwatch Chronograph Cal. 321 Full Steel Heavy Patina Original Owner 1965 (Unpolished)

Omega Speedmaster 105.012-65 with Caliber 321

Omega has built its reputation on precision engineering, technical innovation, and a long history of association with professional timing, aviation, and space exploration. The brand’s commitment to accuracy and durability has positioned many of its models as benchmarks within the watch industry.

The Speedmaster 105.012-65 is one of the most important references in the Speedmaster lineage, known for its direct connection to NASA’s space program and use during the Apollo era. Featuring the revered Caliber 321 and classic step-dial design, it represents a key moment in Omega’s development of professional chronographs. Examples preserved in original, untouched condition are especially prized, highlighting both the historical significance and enduring desirability of this model.

Key Details To Consider

Very rare and completely original Omega Speedmaster Ref. 105.012-65 chronograph in never-polished condition. The case retains its factory finish with exceptionally thick, sharp lugs, having never been touched up or restored. The period-correct black tritium step dial remains original, showing a superb yellow patina evenly distributed across all indices with matching hands that still react and glow green under UV light.

The black service bezel is in excellent condition, as is the original plexi crystal. The bracelet is unusually stiff with virtually no stretch and fits a large +8” (20 cm) wrist, suggesting it retains all original links and was rarely, if ever, sized.

Powered by the legendary Caliber 321, the movement was last serviced about a year ago by the previous owner and runs properly. Examples of this reference in comparable condition are increasingly difficult to source and remain highly sought after by collectors.

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