BERNY Compressor-style Diver V4 AM181MSvsSeiko Prospex Sea 1968 Heritage Diver's GMT Limited Edition
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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 AM181MS

Prospex Sea 1968 Heritage Diver's GMT Limited Edition
Diameter
42mm
42mm
Lug-to-Lug
49mm
48.6mm
lowest
Thickness
14mm
13.3mm
lowest
Water Resistance
200m
300m
highest
Power Reserve
42h
72h
highest
MSRP
$156
lowest
$1,750
Movement
Miyota 8215
Seiko 6R54
Case
4 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
BERNY BERNY-Men Automatic Compressor-style Diver Watch V4-AM181MS owners widely praise its solid build, comfortable wear, and excellent lume, with one owner noting the second crown operates the inner bezel. The watch features a compressor-style design, 200m water resistance, and sapphire crystal front and back, and its AR coating is considered superior by one owner. The fit and finish are reported to be on par with higher-end pieces, and many find it a sharp, well-fitting watch that they intend to keep long-term. Overall, owners rate the BERNY BERNY-Men Automatic Compressor-style Diver Watch V4-AM181MS highly for its exceptional value and impressive build quality at its price point.
The Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition is widely praised for its excellent quality and finishing for its price, with reviewers highlighting its beautiful case, bracelet, and Lumibrite lume. Owners appreciate the comfortable 42mm case size and the 4 o'clock crown position. The watch features a sapphire crystal and uses the in-house 6R54 automatic movement with a three-day power reserve. Some reviewers note that the GMT function is secondary and that the bezel clicks are quieter than expected. The 4:30 date window splits opinion among enthusiasts, and it is described as a "caller GMT" rather than a true "traveller GMT." Overall, owners and reviewers rate the Seiko Prospex Sea 1968 Heritage Diver's GMT Watch Limited Edition highly for its excellent value, quality finishing, and comfortable wearability.
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