How much does the Bremont Supermarine 300M cost?

The Bremont Supermarine 300M has a manufacturer MSRP of $3,550 USD. On the secondary market it averages around —.

What movement does the Bremont Supermarine 300M use?

The Bremont Supermarine 300M is powered by the BE-92AE automatic movement.

How big is the Bremont Supermarine 300M?

The case measures 40mm in diameter, 12mm thick.

What is the water resistance of the Bremont Supermarine 300M?

The Bremont Supermarine 300M is rated to 300m of water resistance.

What is the case of the Bremont Supermarine 300M made of?

The case is 904L Stainless Steel.

What kind of crystal does the Bremont Supermarine 300M have?

The Bremont Supermarine 300M uses a Sapphire crystal.

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Bremont Supermarine 300M

Name: Bremont Supermarine 300M
Brand: Bremont
SKU: sm40-nd-ss-gn-b
Price: 3550 USD
Availability: InStock

Ref. sm40-nd-ss-gn-b

Diver

The Bremont Supermarine 300M is praised for its comfortable 40mm and 42mm case sizes, with owners noting the 42mm wears well on smaller wrists due to its lug design. One owner highlights the 13mm thinness of the 40mm case, considered compact for a 300m diver. The watch is priced at $1375. On balance, owners and reviewers appreciate the Bremont Supermarine 300M for its wearability and compact dimensions, especially for a dive watch.

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Retail MSRP

$3,850

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Alternatives

Case

40mm

Power Reserve

—

Movement

Automatic

Water Resistance

300m

Crystal

Sapphire

Case Dimensions

Diameter40mm

Thickness12mm

Lug-to-Lug—

Lug Width20mm

Case Build

Material904L Stainless Steel

Water Resistance300m

Crystal & Dial

CrystalSapphire

Dial ColorGreen

Movement

Caliber

BE-92AE

TypeAutomatic

Beat Rate—

Power Reserve—

Jewels—

HackingNo

Hand-WindingNo

ComplicationsTime only

Design Language

Dial styleMatte

BezelRotating (dive)

Bracelet / strapLug-attached bracelet

HandsBaton

AI-detected from product image · 5/22/2026

Photos

In a nutshell

The Bremont Supermarine 300M (ref. sm40-nd-ss-gn-b) is an automatic diver watch, with a 40mm 904l stainless steel case, 12mm thick, powered by the BE-92AE movement. Water resistance is rated to 300m, under a sapphire crystal. Manufacturer MSRP is $3,550. The dial color is green.