Tissot Seastar 1000 GMTvsUnimatic Modello Quattro UT4-GMT Toolwatch GMT (40mm)
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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.

Seastar 1000 GMT

Modello Quattro UT4-GMT Toolwatch GMT (40mm)
Diameter
40mm
40mm
Thickness
11.8mm
n/a
Water Resistance
300m
300m
MSRP
$575
lowest
$655
Movement
11.5'
Ronda 515.24D
Case
4 specsCrystal & Dial
3 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Tissot Seastar 1000 GMT for its sapphire crystal, improved finishing, and GMT complication, with one owner expressing deep satisfaction. A potential drawback noted by the community is that Swiss quartz movements, unlike some Japanese counterparts, may exhibit second hands that do not precisely align with dial markers. On balance, owners rate the Tissot Seastar 1000 GMT highly for its build quality and useful GMT function at its price point.
Owners widely praise the Unimatic Modello Quattro UT4-GMT Toolwatch GMT (40mm) for its robust, no-nonsense tool watch design, minimalist aesthetic, and utilitarian sandblasted finish. Its quartz GMT movement is noted for its reliability and ease of use, fitting well with its rugged concept, and the watch is MIL-STD-810 tested with successful drop tests reported. Some owners find the fixed 24-hour bezel purposeful, while others feel the minimalist design lacks character. The watch's short, non-curved lugs mean it sits flat on the wrist, which can be limiting on smaller wrists, though it wears well on average ones. On balance, owners and reviewers rate the Unimatic Modello Quattro UT4-GMT Toolwatch GMT (40mm) highly for its durable build and functional tool watch appeal at its price point.
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