Omega Seamaster Planet Ocean | 215.30.46.51.99.001 | 45.5mm | Stainless Steel | Grey Dial

A Legacy Forged Beneath the Waves

Omega's Seamaster lineage traces its roots to the 1957 Seamaster 300 — a tool built for professional mariners and explorers. The Planet Ocean takes that heritage further: an uncompromising, modern dive watch engineered for the most demanding underwater environments while retaining the refinement expected by discerning collectors.

The Specifications of a True Dive Instrument

• Reference Number: 215.30.46.51.99.001
• Water Resistance: 600 m / 2000 ft
• Helium Escape Valve: Yes — engineered for saturation diving and safe decompression
• Unidirectional Rotating Bezel with Ceramic Insert: For precise elapsed-time measurement and scratch resistance
• Co‑Axial Master Chronometer Calibre: Automatic movement offering high precision and reliability
• Case Diameter: 45.5 mm
• Case Material: Stainless Steel
• Bracelet Material: Stainless Steel with Glidelock-style clasp/extension
• Dial / Color: Grey
• Includes: Box, Case, Warranty Card, Instruction Manual

The Curator's Insight:
The presence of a dedicated helium escape valve and a thick 600 m rating is not mere bravado — it signals Omega’s insistence on functional authenticity. These are the small, purpose-driven details that separate a true professional instrument from a fashion diver.

A Tool You Can Trust with Your Life

This 45.5 mm Planet Ocean is a statement of substance: oversized for legibility, engineered for depth, and finished with the polish and presence worthy of a modern luxury collection. For collectors in search of a robust daily wearer that doubles as a bona fide dive instrument, this Seamaster delivers the confidence and provenance only decades of underwater mastery can provide.

This Watch is Ideal For...

• Professional or serious recreational divers and maritime professionals
• Collectors seeking a bold, technically authentic sports watch
• Individuals who demand both rugged utility and refined finishing in a single timepiece