BERNY Compressor-style Diver V4 AM439MSvsBremont Supermarine 300M

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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.

Compressor-style Diver V4 AM439MS

Supermarine 300M
Diameter
42mm
40mm
Lug-to-Lug
49mm
n/a
Thickness
13.5mm
12mm
lowest
Water Resistance
200m
300m
highest
MSRP
$154
lowest
$3,550
Movement
Miyota 8215
Bremont BE-92AE
Case
7 specsCrystal & Dial
1 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The BERNY BERNY-Men Automatic Compressor-style Diver Watch V4-AM439MS is praised for its solid build, comfortable wear, and great lume, with owners specifically noting the exceptional anti-reflective coating on its sapphire crystals, which some feel surpasses that on watches from Citizen and San Martin. The watch features a Miyota 8215 automatic movement, 200m water resistance, and a 42mm case, with one owner highlighting the second crown's function for controlling the inner bezel. It was purchased for as low as $70 on AliExpress. Overall, owners rate the BERNY BERNY-Men Automatic Compressor-style Diver Watch V4-AM439MS highly for its impressive build quality and visual appeal at its price point.
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.
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