Decima GatekeepervsHTD Watches Tennis
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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.

Gatekeeper

Tennis
Diameter
38mm
37mm
Lug-to-Lug
46mm
44mm
lowest
Thickness
9.9mm
9mm
lowest
Water Resistance
50m
100m
highest
Power Reserve
42h
n/a
MSRP
$599
lowest
$791
Movement
Miyota 9039
Miyota 9039
Case
6 specsCrystal & Dial
2 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Decima Gatekeeper is praised for its hypnotizing dial, with design elements that draw comparisons to the Ingenieur and Czapek. Owners note the watch features a Miyota 9039 automatic movement, a 38mm case, and 50m water resistance. On balance, owners rate the Decima Gatekeeper highly for its striking dial design.
HTD Watches Tennis is widely praised for its thinness, 37mm case size, and 100m water resistance, offering a comfortable and functional sports watch design with a clean, time-only aesthetic and a polished watch head with a fully brushed bracelet. Some owners find the design plays too safe and the hands are slightly too short. Overall, owners rate the HTD Watches Tennis highly for its comfortable wearability and clean design at the price.
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