OMEGA Speedmaster Moonphase

The Omega Speedmaster Moonphase 304.23.44.52.13.001 is a chronograph with a 44.25 mm case in steel and Sedna gold. The case measures 16.85 mm thick with a lug-to-lug of 50 mm. A sapphire crystal with anti-reflective treatment on both sides covers the brown dial. Inside is the self-winding calibre 9904, a Master Chronometer movement certified by METAS with a column wheel and co-axial escapement, running with 60 hours of power reserve. Beyond the chronograph function the dial adds a moonphase display, small seconds and date. The case has a transparent caseback and pairs with a brown alligator leather strap on a steel foldover clasp. The screw-down build keeps water resistance at 100 metres.