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New Releases · 2026-06-17

Bremont’s HMAF Supermarine 40 Date is the Royal Navy diver

The maritime member of Bremont’s Armed Forces collection combines an ultra-matt grey steel case, ceramic bezel and 300-metre rating.

By Chronolume digest · Original English summary · Based on Bremont; launch date corroborated by Monochrome

Bremont HMAF Supermarine 40 Date on grey nubuck
The Royal Navy edition uses an ultra-matt grey case and ceramic bezel. Bremont ↗

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This is a sourced news summary, not a hands-on review. Read the original reporting at Bremont; launch date corroborated by Monochrome ↗

What to know

The HMAF Supermarine 40 Date interprets the Royal Navy through a restrained palette of ship-like greys. Its 40mm 904L-steel case receives an ultra-matt treatment, surrounding a light-grey gradient dial and full ceramic dive bezel. The official Navy heraldic badge sits above six o’clock, with luminous hands and indexes supporting underwater readability.

Angled view of the Bremont HMAF Supermarine 40 Date
The 40mm diver is rated to 300 metres. Bremont ↗

Bremont’s BB64 automatic movement supplies a stated 56-hour reserve, while the case is rated to 300 metres. The watch is fitted to brushed-grey nubuck leather, an unusual but deliberate choice for the presentation configuration. Reference SM40-DT-GRSS-HMAF-L-S is limited to 300 pieces and listed at £3,950. It is the sea-focused counterpart to the Army Terra Nova and RAF Altitude.

Caseback of the Bremont HMAF Supermarine 40 Date
The HMAF Supermarine is limited to 300 pieces. Bremont ↗

At a glance

Specifications reported by Bremont; launch date corroborated by Monochrome
referenceSM40-DT-GRSS-HMAF-L-S
caseUltra-matt grey 904L stainless steel, 40 mm
bezelCeramic dive bezel
dialLight-grey vertical gradient with Navy badge
movementBremont BB64 automatic
powerReserve56 hours
waterResistance300 m
limitedEdition300 pieces
price£3,950

Explore the watches

Bremont HMAF Supermarine 40 Date SM40-DT-GRSS-HMAF-L-S · SM40-DT-GRSS-HMAF-L-S ↗

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Source & attribution

Bremont; launch date corroborated by Monochrome · Published 2026-06-17 ↗