Speedmaster Professional 105.012-66 - Cal. 321 Pre-Moon - Watch Only - 1966

Speedmaster Professional 105.012-66 - Cal. 321 Pre-Moon - Watch Only (1966)

The 105.012 is the reference that defined the modern Speedmaster - the first to wear the asymmetric crown-protected "twisted lug" case, the applied Omega logo and the Professional designation on the dial, and one of the references NASA flight-qualified for manned space missions. This 1966 -66 sub-variant is powered by the legendary column-wheel Caliber 321 and presents here in excellent condition, all matching.

Details:

• Reference: 105.012-66
• Year: 1966
• Case Size: 42mm, stainless steel, asymmetric crown-protected case with twisted lyre lugs
• Bezel: Black aluminium tachymeter insert, Base 500, Dot Over 90 (DON)
• Dial: Matte black step dial with applied Omega logo, "Speedmaster Professional" script, three subdials (running seconds, 30-minute, 12-hour), tritium luminescent baton hour markers showing warm cream patina, "T SWISS MADE T" at 6 o'clock
• Hands: Straight white chronograph hands with matching tritium fill
• Movement: Omega Caliber 321, hand-wound chronograph with column wheel, based on Lemania 2310, 17 jewels, 18,000 vph, approximately 44-hour power reserve
• Crystal: Hesalite (acrylic / plexiglass)
• Strap: Omega-signed dark brown leather strap with Omega-signed steel pin buckle
• Caseback: Closed steel caseback with engraved Seahorse (Hippocampus) medallion and "SPEEDMASTER" inscription
• Water Resistance: Not water resistant - vintage piece, keep away from water

Set Includes:

• Watch only

Condition:

• Excellent overall condition, all matching
• Case retains its original asymmetric profile with crisp lug lines
• Step dial original and clean, with even warm cream tritium patina across all hour markers and subdial indices
• DON tachymeter bezel original, with even, age-appropriate patina
• Hesalite crystal clear and presentable for a watch of this age
• Hands matching the dial with the same cream tritium fill
• Omega-signed crown and pump pushers, all chronograph functions operating
• Caseback Seahorse engraving crisp and legible

The Caliber 321 is the column-wheel chronograph movement Omega used in every flight-qualified Speedmaster from the original 2915 reference through 1968, a hand-finished movement so beloved that Omega revived its production from scratch in 2019 for a tiny annual run of platinum and gold models - making an honest, all-matching original 321 reference like this 105.012-66 one of the most collectible Speedmasters a vintage enthusiast can own.