Seiko Seiko 5 Sports SKX seriesvsUnimatic Modello Uno
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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.

Seiko 5 Sports SKX series

Modello Uno
Diameter
38mm
40mm
Lug-to-Lug
44.2mm
n/a
Thickness
12.1mm
n/a
Water Resistance
100m
300m
highest
Power Reserve
41h
41h
MSRP
$350
lowest
$740
Movement
Seiko 4R36
Seiko NH35
Case
5 specsCrystal & Dial
3 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Seiko 5 Sports SKX series is widely praised as an excellent value gateway watch, with owners and reviewers highlighting its solid build and powerful lume. The 22mm bracelet is noted for its comfort, and the watch offers numerous style options. Some owners find the original SKX models heavy and bulky, while others appreciate their ruggedness and iconic dive watch design. The Seiko 5 Sports SKX series offers an upgraded movement with hacking and hand-winding, and standard spring bars for easier strap changes. However, it lacks the screw-down crown and ISO certification of the original SKX, leading some to consider it less of a tool watch. On balance, owners and reviewers rate the Seiko 5 Sports SKX series highly for its value and modern features, despite some preferring the tool watch capabilities of its predecessor.
Owners widely praise the Unimatic Modello Uno's exceptionally well-finished case and minimalistic, utilitarian design, which feels like a technical instrument. Reviewers note clever case details like mirrored lugs and crown guards, a mix of brushed and polished finishes, and a matte black dial that offers interesting light play. The sapphire crystal's anti-reflective coating creates hypnotic color-swapping effects. Some owners find the stock bracelet and rubber strap uncomfortable, preferring the NATO option. The Seiko NH35 automatic movement is described as reliable. On balance, owners and reviewers rate the Unimatic Modello Uno highly for its distinctive, minimalistic design and impressive case finishing at its price point.
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