Co‑Axial Master Chronometer 42 mm

This 42 mm Seamaster Diver 300M, with its case in stainless steel, has a blue rubber strap. The ceramic dial, in OMEGA’s own Summer Blue, is PVD-treated and has a gradient finish to reflect the watch’s level of water resistance. It also includes the 300M’s famous wave pattern.

A blue ceramic bezel with a Summer Blue enamel (Grand feu) diving scale encircles the dial, which has rhodium-plated skeleton hands and raised indexes, filled with a unique light blue Super-LumiNova.

Turning the watch over reveals a stamped commemorative Seamaster logo depicting a trident-bearing Poseidon and two seahorses: OMEGA’s 1956 original and the brand’s current design. Behind which sits OMEGA’s Co-Axial Master Chronometer calibre 8800, certified at the industry’s highest level by the Swiss Federal Institute of Metrology (METAS).

Features

• Anti‑magnetic
• Chronometer
• Date
• Helium escape valve
• Master Chronometer Certified
• Screw‑in crown
• Unidirectional rotating bezel

Case

• Between lugs: 20 mm
• Lug‑to‑lug: 49.9 mm
• Thickness: 13.6 mm
• Case diameter: 42 mm
• Case: Steel
• Water resistance: 30 bar (300 metres / 1000 feet)
• Total product weight (approx.): 119 g

Dial and Crystal

• Dial colour: Blue
• Crystal: Domed scratch‑resistant sapphire crystal with anti‑reflective treatment on both sides

Strap

• Strap type: Rubber strap
• Strap color: Blue
• Strap surface: Rubber
• Strap underside: Rubber
• Buckle type: Pin buckle
• Buckle material: Stainless steel