Omega Speedmaster Moonwatch Professional 42mm Sapphire 310.30.42.50.04.001

Speedmaster Moonwatch Professional — Sapphire Caseback (310.30.42.50.04.001) The Speedmaster Moonwatch Professional with sapphire crystal and display caseback exposes Calibre 3861 — the METAS-certified Co-Axial Master Chronometer movement — while retaining every element of the original 1969 moonwatch: the asymmetric 42mm stainless steel case, white lacquered step dial, tachymeter bezel, and hand-wound manual chronograph mechanism.

• Case: 42mm | Stainless Steel | 13.18mm thick
• Dial: White lacquered step dial with applied Omega logo, tachymeter scale on bezel; subsidiary dials at 3, 6, 9
• Movement: Manual-winding Co-Axial chronograph, Calibre 3861, Co-Axial Master Chronometer certified by METAS
• Power Reserve: Approx. 50 hours
• Water Resistance: 50 metres
• Bracelet/Strap: Stainless steel bracelet, folding clasp