Speedmaster Moonwatch Professional 42mm

The only watch to survive NASA's qualification testing in 1965. Worn on the Moon in 1969. Now powered by the calibre 3861, a full reworking of the hand-wound lineage.

• Co-Axial escapement, silicon balance spring, 50hr power reserve
• METAS Master Chronometer certified, 15,000 gauss magnetic resistance
• Stepped dial adds depth over previous generation
• Hesalite crystal (same acrylic flown on Apollo) or sapphire caseback
• 42mm stainless steel, 13.18mm thick in hesalite
• Sub-dial graduations now calibrated to actual beat rate