DOXA SUB 300 BetavsZelos Hammerhead V3 300m Titanium
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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.

SUB 300 Beta

Hammerhead V3 300m Titanium
Diameter
42.5mm
44mm
Thickness
n/a
13mm
Water Resistance
300m
300m
Power Reserve
38h
n/a
MSRP
$2,490
$559
lowest
Movement
Automatic
Seiko NH35
Case
5 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The DOXA SUB 300 Beta is praised for its refined aesthetic and vintage charm, with a wave-patterned dial, ceramic bezel, and box-domed sapphire crystal. Owners find its 42.5mm case wears well due to its compact feel and short lug-to-lug length, making it suitable for smaller wrists and comfortable for all-day wear. The watch is powered by an automatic movement with a 38-hour power reserve. Some reviewers question the inclusion of a helium escape valve on this less tool-oriented design, and one owner notes the polished bezel is prone to scratches. Overall, owners and reviewers appreciate the DOXA SUB 300 Beta for its blend of classic dive watch appeal and modern wearability.
Owners widely praise the Zelos Hammerhead V3 300m Titanium for its unique, otherworldly dial finishing that reflects light beautifully, its excellent lume application, and its lightweight, comfortable wearability, especially given its 44mm case size and 48mm lug-to-lug. The solid build quality is noted as exceeding its price point, with a comfortable bracelet featuring on-the-fly micro-adjustment. However, some owners find the clasp could be more scratch-resistant, and resizing bracelet pins can be stubborn. One owner reported a previous model's bezel was very hard to turn and the date was skewed. Overall, owners rate the Zelos Hammerhead V3 300m Titanium highly for its unique dial and impressive build quality at the price.
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