Bremont Supermarine 300M GMT Automatic 40mm automatic watch, red dial
SM40-GMT-SS-RDBK-B
£3,850
Price at Goldsmiths, checked 28 October 2026. Prices can change: Goldsmiths' page has the final word.
40mmAutomatic300 m water resistantStainless steelUnisex
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Specifications
| Brand | Bremont |
|---|---|
| Model | Supermarine 300M GMT Automatic |
| Reference | SM40-GMT-SS-RDBK-B |
| Gender | Unisex |
| Style | — |
| Case size | 40mm |
|---|---|
| Lug to lug | — |
| Case material | Stainless steel |
| Bezel | — |
| Dial colour | Red |
| Strap | Stainless steel |
Will 40mm suit your wrist? Check your size
| Movement | Automatic |
|---|---|
| Calibre | — |
| Power reserve | 50 hours |
| Water resistance | 300 m |
| Crystal | Sapphire |
| Thickness | — |
| Date | — |
| Guarantee | Bremont 3 Year Guarantee |
A dash means neither Goldsmiths nor Bremont states it on the pages we read, so it's left blank rather than guessed.