Bremont Supermarine 300MvsSeiko Prospex Alpinist
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Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.
Supermarine 300M
Prospex Alpinist
Diameter
40mm
38mm
Lug-to-Lug
n/a
46mm
Thickness
12mm
lowest
12.9mm
Water Resistance
300m
highest
200m
Power Reserve
n/a
70h
MSRP
$3,550
$503
lowest
Movement
Bremont BE-92AE
Seiko 6R35
Case
6 specsCrystal & Dial
2 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Bremont Supermarine 300M is praised for its comfortable 40mm case, which some owners find wears well even on smaller wrists due to its lug design, outperforming some 40mm watches. One forum contributor notes the 40mm case is relatively compact for a 300m diver and is priced at $1375. A reviewer found the 40mm case comfortable. On balance, owners and reviewers appreciate the Bremont Supermarine 300M's wearable 40mm case size and comfortable wearability.
Owners widely praise the Seiko Prospex Alpinist for its excellent 38mm case size and versatile design, making it a capable everyday and business-casual watch. The dark green sunburst dial is a standout feature, described as dynamic and beautifully textured. Its character is further enhanced by the compass bezel and gold indices, and it is considered a great "GADA" (Go Anywhere, Do Anything) watch and a "strap monster" adaptable to various bands. One owner notes the gold tone is less convincing than solid gold alternatives. Overall, owners rate the Seiko Prospex Alpinist highly for its appealing design and wearability at the price point.
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