OMEGA Constellation

The Omega Constellation reference 131.63.41.21.01.001 has a 41 mm case in yellow gold. The case is 13.5 mm thick and measures 44 mm lug to lug. The watch runs the self-winding Omega Calibre 8901, with a 60 hour power reserve. A domed sapphire crystal with anti-reflective treatment on both sides covers the black dial. The Constellation is certified as a Master Chronometer by METAS and has a date window at 6 o'clock. It also has a display back. Omega rates the case to 50 metres. A black leather strap with rubber lining is fitted to the watch.