Spinnaker Cahill AutomaticvsTissot Seastar 1000
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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.

Cahill Automatic

Seastar 1000
Diameter
42mm
40mm
Lug-to-Lug
51mm
n/a
Thickness
13.7mm
12.5mm
lowest
Water Resistance
200m
300m
highest
Power Reserve
n/a
80h
MSRP
$350
lowest
$875
Movement
Seiko NH35
Tissot Powermatic 80
Case
6 specsCrystal & Dial
4 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Spinnaker Cahill Automatic for its attractive design and good value, particularly when purchased at a discount. Its 42mm size is considered ideal for smaller wrists, and the NATO strap is a favored feature. Timekeeping is generally found to be solid, with one owner noting excellent accuracy comparable to Seikos. The maxi indices are also appreciated for legibility. However, some owners express concerns about quality control and finishing for the price, with one reporting internal component failures in two separate watches. Other noted compromises include uneven lume and the use of a mineral crystal. Overall, owners and reviewers rate the Spinnaker Cahill Automatic well for its attractive design and value, especially when found at a discount.
Owners widely praise the Tissot Seastar 1000 for its value and solid build, with one reviewer calling it a comfortable, sporty, and affordable everyday watch with a great case and dial ratio. However, some owners find the Tissot Seastar 1000 too large and poorly proportioned, citing small indices on larger dials and a difficult-to-read bezel. Criticisms also include a non-reflective crystal causing glare, mediocre lume, and a subpar bracelet, with some feeling it is underwhelming for the price compared to other divers. Overall, owners rate the Tissot Seastar 1000 highly for its value and solid build at the price point.
The 80-hour power reserve from the Powermatic 80 movement is a significant strength. Reviewers did not reach a consensus on any weaknesses.
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