The Supermarine 300m has been entirely redesigned and now feature a new, sleeker and slimmer profile case shape crafted in 904L steel to maximise robustness and comfort in unison.

This new symmetrical case silhouette includes both crown and bezel guards, ensuring practical operation whilst increasing durability and safety by preventing accidental adjustment or damage through shocks or knocks.

Movement

Modified Calibre 11 1/2’’’ BE-92AO

25 Jewels

Glucydur balance wheel

Anachron balance spring

Nivaflex mainspring

28,800BPH (4Hz)

50-hour power reserve

Case

Case construction made from 904L stainless steel

Blue Aluminium uni-directional dive bezel

Screw-in crown

Case Diameter: 40mm

Case Length: 49mm

Case Depth: 12mm

Lug Width: 20mm

Case back

Stainless steel screw-in and decorated closed case back

Crystal

Domed anti-reflective, scratch resistant sapphire crystal

Water Resistance

30ATM, 300 metres

Strap

Quick release bracelet with micro adjustment feature