Seamaster Diver 300M Co‑Axial Master Chronometer 43.5 mm

Since 1993, the Seamaster Professional Diver 300M has enjoyed a legendary following. OMEGA’s 21st century models stay true to the original’s dive watch design, while introducing exciting new materials and movements.

On this 43.50 mm model, black ceramic [ZrO2] dominates. The case, bezel, wave-pattern dial, crown and helium escape valve, all in the same striking material, give the watch a very distinctive, uniform and sculptural look. To ensure visibility without affecting the overall aesthetic, OMEGA has introduced anthracite Super-LumiNova to the diving scale, the black PVD indexes and skeleton hands - and dot at 12H.

Completing the look is an integrated black rubber strap with black ceramic buckle. Adding some light to the darkness is a window with a clear view of the movement. Visible through the sapphire-crystal on the wave-edged caseback is OMEGA’s Co-Axial Master Chronometer Calibre 8806.

Features
Anti-magnetic
Chronometer
Helium escape valve
Master Chronometer Certified
Screw-in crown
Transparent caseback
Unidirectional rotating bezel

Case
Between lugs: 21 mm
Lug‑to‑lug: 51.5 mm
Thickness: 14.5 mm
Case diameter: 43.5 mm
Case: Black ceramic
Water resistance: 30 bar (300 metres / 1000 feet)
Total product weight (approx.): 114 g
1. Between lugs
2. Lug-to-lug
3. Case diameter
4. Thickness

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

Strap
Strap type: Rubber strap
Strap color: Black
Strap surface: Rubber
Strap underside: Rubber
Buckle type: Pin buckle
Buckle material: Ceramic

Reference
210.92.44.20.01.003