Addiesdive Tuna 300M Automatic Dive Watch AD2509vsAudaz Sea Ranger ADZ-2050
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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.

Tuna 300M Automatic Dive Watch AD2509

Sea Ranger ADZ-2050
Diameter
41mm
42mm
Lug-to-Lug
44.5mm
lowest
50mm
Thickness
15mm
14.5mm
lowest
Water Resistance
300m
highest
200m
MSRP
$139
lowest
$375
Movement
Seiko NH35
Seiko NH35
Case
4 specsCrystal & Dial
1 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Addiesdive Tuna 300M Automatic Dive Watch AD2509 for its excellent value, with many finding the case finishing comparable to higher-priced brands and appreciating the sapphire crystal and strong lume. The Seiko NH35 movement is generally considered reliable and keeps good time, with some owners reporting accuracy within +1/+2 seconds per day, while others note figures around -6 seconds per day. The watch is seen as a competent homage, featuring a ceramic bezel insert and solid link bracelet. One owner noted the 39mm case size as easy to wear on a 7-inch wrist. However, some owners express skepticism regarding the actual water resistance beyond casual use, despite the 300m rating, and question the warranty's reliability. The bracelet is frequently described as significantly worse than that found on comparable brands, though still visually appealing. Quality control variance is a concern for some, with instances of misaligned bezel inserts reported.
Owners praise the Audaz Sea Ranger ADZ-2050 for its value and resemblance to higher-end dive watches. One owner finds the 42mm case a bit large for smaller wrists. The watch features a 316L stainless steel case, sapphire crystal, ceramic bezel, blue Swiss Super Luminova, and a Seiko NH35 automatic movement. Overall, owners rate the Audaz Sea Ranger ADZ-2050 well for its impressive specification set and affordability.
The watch features a 42mm case, sapphire crystal, ceramic bezel, and 200m water resistance. Swiss Superluminova provides illumination.
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