Oris Divers Sixty-Five 12H Calibre 400

About This Watch

The Oris Divers Sixty-Five 12H Calibre 400 is the most technically advanced watch in the Sixty-Five collection, combining the in-house Calibre 400 with a distinctive 12-hour bidirectional bezel that adds travel-watch functionality to the vintage diver format. Unlike a standard dive bezel that tracks elapsed minutes, the 12-hour bezel allows tracking of a second time zone by aligning it with the hour hand — a simple, elegant GMT alternative that requires no additional movement complication. This means the wearer gets dual-time-zone capability in a watch with a clean, three-hand dial layout that preserves the vintage simplicity of the Sixty-Five design language. The Calibre 400's 120-hour power reserve is transformative in a vintage-styled watch — it means this classically proportioned 38mm diver can sit unworn for an entire work week and still be running on Saturday morning. The 10-year warranty and 10-year service interval provide peace of mind that extends well beyond the typical 2-year warranty of the standard Sixty-Five. The green dial with its domed sapphire crystal and brown leather strap creates the same evocative vintage combination as the standard model, but the Calibre 400 elevates the underlying substance to an entirely different level. The red rotor visible through the exhibition caseback is the visual signature of the Calibre 400, immediately identifying this as the premium variant. At $3,200, the 12H Calibre 400 represents a significant step up from the standard Sixty-Five, but the in-house movement, extended warranty, five-day power reserve, and 12-hour bezel functionality justify the premium for enthusiasts who want the vintage aesthetic with modern manufacture-grade substance.