Clean. Dark. Unstoppable.

The Sub 300 is a handbuilt Seiko mod inspired by the watch that defined what a dive watch should be. Black ceramic bezel, black dial, stainless jubilee bracelet — no colour, no compromise. Every piece is assembled fresh to order in the United Kingdom.

Powered by the NH35 automatic movement with a 42-hour power reserve, the Sub 300 is built to perform as well as it looks. Water resistant to 200m with a screw-down crown and sapphire crystal — a proper tool watch with no shortcuts.

On the wrist it sits on a solid stainless steel oyster bracelet, weighty and well finished, exactly as it should be.

— Black ceramic bezel

— Black dial with luminous hour markers

— NH35 automatic movement, 42-hour power reserve

— Stainless steel oyster bracelet

— Sapphire crystal glass

— Screw-down crown, 200m water resistance 

— Hand built to order in the UK

— Free insured UK delivery · 30-day returns