OMEGA Speedmaster Moonphase

Omega's Speedmaster Moonphase, reference 304.23.44.52.06.001, is a chronograph with a 44.25 mm case in steel and gold. The case measures 16.85 mm thick with a 50 mm lug-to-lug span, and the grey dial sits beneath a scratch-resistant sapphire crystal treated with anti-reflective coating on both sides. Inside is the self-winding calibre 9904, a Master Chronometer movement certified by METAS with a column wheel, Co-Axial escapement and silicon balance-spring, delivering a power reserve of 60 hours. The dial adds a moonphase display alongside chronograph counters, small seconds and a date function shown by hand. A tachymeter scale supports the chronograph's timing. A sapphire display back shows the movement's Geneva waves finish. Grey alligator leather on a steel folding clasp closes the watch, rated to 100 metres of water resistance.