DOXA SUB 300 BetavsSeiko SKX009
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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

SKX009
Diameter
42.5mm
42mm
Lug-to-Lug
n/a
46mm
Thickness
n/a
13.4mm
Water Resistance
300m
highest
200m
Power Reserve
38h
40h
highest
MSRP
$2,490
n/a
Movement
Automatic
Seiko 7S26
Case
6 specsCrystal & Dial
4 specsMovement
4 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 Seiko SKX009 as a desirable daily beater and a favored summer watch for its looks, comfort, and tool watch feel, with one owner noting an inexplicable quality that makes them choose it over more accurate watches. The unique Arabic date wheel and red strap are specific points of appreciation, and it was a forum favorite for first-time diver purchases. Some owners find the stock bezel insert "hideous" due to its second markers and Pepsi colors, while others chose the watch specifically for it. The Seiko SKX009 is noted as having been discontinued. On balance, owners rate the Seiko SKX009 highly for its enduring tool watch appeal and distinctive aesthetic, making it a beloved, albeit now discontinued, choice.
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