Very rare transitional Omega Speedmaster reference 105.012. Exceptional unpolished case. Beautiful original step dial with applied logo. Original tritium hands matching beautifully with the cream patina of the original index markers. Original Don over 90 bezel. Very clean Omega Caliber 321, running like a champ and all chrono functions spot on. Original, mint and full size Omega expandable 1039 bracelet with 516 end links.