OMEGA Seamaster 300

This Omega Seamaster 300, reference 234.63.41.21.99.002, is a dive watch in yellow gold measuring 41 mm across. The case stands 14.65 mm thick with a lug-to-lug span of 48 mm, and the unidirectional rotating bezel frames a blue dial. Inside is the self-winding calibre 8913, a Co-Axial Master Chronometer movement certified by METAS and resistant to magnetic fields up to 15,000 gauss. It runs on a freesprung balance with a silicon spring and offers a time zone function alongside 60 hours of power reserve. A domed sapphire crystal with antireflective treatment sits over the dial, and a display back shows the Sedna gold rotor. The blue leather strap closes with a yellow gold foldover clasp. The case carries a 300 metre water resistance rating.