Photo by Torsten Bolten (public domain), via Wikimedia Commons
Speedmaster Professional
The hand-wound, NASA-qualified line: the original Moonwatch. The 42mm hesalite-crystal canon is the reference design; sapphire and "First Omega in Space" branch off without leaving the Professional spec.
luxuryvintageLemania Cal. 321 -- manual-wind column-wheel chronograph, 18,000bph, 48h PR; lateral clutch, triple-hammer; same caliber used on Moonwatch NASA mission42mm1968–1988editorial
luxuryvintageLemania Cal. 321 -- manual-wind column-wheel chronograph, 18,000bph, 48h PR; lateral clutch, triple-hammer; same caliber used on Moonwatch NASA mission42mm1967–1968editorial
luxurymodernLemania Cal. 321 -- manual-wind column-wheel chronograph, 18,000bph, 48h PR; lateral clutch, triple-hammer; same caliber used on Moonwatch NASA mission39.7mm2020–presenteditorial