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Supermarine 300M GMT — on a clear background
Watches · Bremont

Supermarine 300m GMT

Ref. SM40-GMT-SS-GNBK-B · In the case
The Bremont Supermarine 300M GMT Tundra Green combines dive-watch durability with practical GMT functionality for global exploration. Its 40mm 904L stainless steel case features a linear gradient green dial, bi-directional 24-hour bezel and vivid orange GMT accents, with Super-LumiNova® for exceptional legibility. Powered by a modified automatic GMT calibre with a 50-hour power reserve and 300m water resistance, it is built for adventure across land and sea.
Price on requestSpoken for in person
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  • Manufacture CalibreModified Calibre 11 1/2’’’ BE-93-2AV
  • DialTundra Green
  • StrapBracelet
Why we carry it

A dive watch with serious global capability.

The Supermarine 300M GMT combines 300m water resistance with practical GMT functionality in a refined 40mm 904L steel case.

We carry it for its Tundra Green gradient dial, distinctive orange GMT hand and versatile travel-ready design.

For clients who value adventure, precision and effortless time-zone tracking, it is Bremont built to travel further.

The movement · Modified Calibre 11 1/2’’’ BE-93-2AV

A GMT calibre built for global exploration.

The Modified Calibre 11 1/2’’’ BE-93-2AV powers the Supermarine 300M GMT with a 50-hour power reserve and independent GMT functionality. Modified to Bremont’s specifications, it delivers reliable precision for tracking multiple time zones wherever the journey leads.

Servicing is handled through Bremont’s authorised service network, with specialist care to maintain the calibre’s performance and reliability.

Calibre
Modified Calibre 11 1/2’’’ BE-93-2AV
Type
Automatic
Frequency
28,800bph (4Hz)
Parts & jewels
25 jewels
Power reserve
50 hours
Specifications

The watch, by the number.

The case

Diameter
43 mm
Thickness
13 mm
Lug width
22 mm
Material
904L stainless steel
Finishing
24H bi-directional bezel with a bi-colour aluminium bezel insert
Crystal
Domed anti-reflective, scratch resistant sapphire crystal
Case back
Stainless steel screw-in and decorated closed case back

The Dial & Functions

Colour
Tundra Green
Material
Metal
Finish
Green gradient Matte finish
Indices
Applied indexes infilled with white Super-LumiNova® (Blue emission)
Hands
Polished rhodium-plated hour, minute and second hands infilled with white Super-LumiNova® (Blue emission) Polished rhodium-plated GMT hand with coloured tip infilled with white Super-LumiNova® (Gree emission to match bezel lume)
Seconds
Central sweep seconds with blue Super-LumiNova®
Functions
Central Hour/Minute/Second/GMT Date at 3H Bi-directional rotating bezel

Bracelet & Water Resistance

Strap
Quick release bracelet with micro adjustment feature
Clasp
Micro-adjustment clasp
Crown
Screw-in crown
Water Resistance
30ATM, 300 metres
In the curation

A closer look at the wall.

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Begin a viewing

Hold it once. Turn it over.

A watch makes more sense in the hand than on a screen — particularly through the sapphire back. Book a viewing at 900 West Hastings St., Vancouver and we will put a loupe in your hand.

Begin a viewing →