Pre-Owned Omega Seamaster Planet Ocean 600M GMT — Ref. 215.30.44.22.01.001

The "Oreo" nickname tells you everything you need to know at a glance — and nothing about why this watch is worth your attention. Look closer.

The 215.30.44.22.01.001 is the Planet Ocean GMT, and its defining feature is the bezel — the world's first polished bi-ceramic construction, black and white ceramic bonded together, the contrast deliberately chosen to separate night from day on the 24-hour GMT scale. It is a technical achievement dressed as a design detail. Scratch-resistant, color-stable, and unlike anything else in the Omega lineup.

The 43.5mm stainless steel case houses a black ceramic dial with Arabic numerals and a central GMT hand — a fourth hand that tracks a second time zone independently of the main time display. Date at 3 o'clock. Domed scratch-resistant sapphire crystal with anti-reflective treatment on both sides. Helium escape valve. Alveol screw-in caseback with transparent sapphire window showing the movement. Presented on stainless steel bracelet with patented extendable foldover clasp.

The movement is the Co-Axial Master Chronometer Calibre 8906 — self-winding, 60-hour power reserve, METAS-certified, resistant to magnetic fields exceeding 15,000 gauss. This example has passed pressure testing.

Water resistant to 600 metres. A discontinued reference.

Condition: Very Good. Full set with box and papers.