Seiko Prospex SeavsUnimatic Modello Uno U1-FMN
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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.

Prospex Sea

Modello Uno U1-FMN
Diameter
41mm
40mm
Lug-to-Lug
46.9mm
n/a
Thickness
12.3mm
n/a
Water Resistance
200m
300m
highest
Power Reserve
70h
highest
41h
MSRP
$900
lowest
$960
Movement
Seiko 6R35
Seiko NH35
Case
5 specsCrystal & Dial
4 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Seiko Prospex Sea for its value and robust build, with many highlighting its excellent lume and attractive design. Some owners find the 41mm case size perfect, while others with smaller wrists consider it too large, thick, and heavy. The stock rubber strap is noted as uncomfortable for land wear by one owner. Overall, owners rate the Seiko Prospex Sea highly for its design and value at the price point.
The Unimatic Modello Uno U1-FMN is widely praised for its intensely minimalist and utilitarian design, featuring clever case details like mirrored lug lines and crown guards. Owners appreciate its simple, well-executed diver aesthetic and all-black finish, with many finding the 40mm case very wearable. The Seiko NH35 automatic movement is noted as reliable. Some reviewers feel the lack of a minute track dilutes the brand's signature DNA, making it appear sterile, while others find the Super-LumiNova lume application uneven. One owner reported sharp edges on the bracelet clasp. On balance, owners and reviewers appreciate the Unimatic Modello Uno U1-FMN for its striking minimalist design and solid build quality at its price point.
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