Founded in La Chaux-de-Fonds in 1848, Omega has built one of the most storied reputations in Swiss watchmaking — and since 1993, the Seamaster Diver 300M has been one of its most beloved and enduring references. A genuine tool diver with 300-metre water resistance, Co-Axial movement technology and iconic wave dial since its very first generation. The steel and Sedna gold variant is the most elegant expression of that formula: a watch that takes the serious dive watch credentials of the 300M and wraps them in Omega's proprietary rose gold alloy.

Reference 210.20.42.20.01.001 is a 42 mm stainless steel and 18k Sedna gold automatic diver's watch, 13.56 mm in thickness, with a conical helium escape valve and screw-down crown. The black polished ceramic dial carries laser-engraved waves in positive relief, with skeleton hands and raised indices in 18k Sedna gold filled with white Super-LumiNova — a combination that catches the light in a way no applied marker can match. A date window sits at three o'clock. At its heart beats the Omega Co-Axial Master Chronometer Calibre 8800, METAS-certified and resistant to magnetic fields in excess of 15,000 gauss, with a 55-hour power reserve, visible through the wave-edged sapphire exhibition caseback. The domed sapphire crystal carries anti-reflective treatment on both sides. The unidirectional rotating bezel is crafted in black ceramic with the diving scale in Ceragold — 18k Sedna gold inlaid into the ceramic. Water resistance is rated to 300 metres. The watch is fitted on a stainless steel and 18k Sedna gold bracelet with a foldover clasp with comfort setting and diver extension.

This Omega Seamaster Diver 300M Steel & Sedna Gold is in mint condition and comes as a full set.