Addiesdive Tuna 300M Automatic Dive Watch AD2509vsAigi Watches BARENTS SEA AUTOMATIC round dive watch 43mm, applied markers + date + dive bezel
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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

BARENTS SEA AUTOMATIC round dive watch 43mm, applied markers + date + dive bezel
Diameter
41mm
43mm
Lug-to-Lug
44.5mm
lowest
49mm
Thickness
15mm
11mm
lowest
Water Resistance
300m
highest
200m
MSRP
$139
lowest
$180
Movement
Seiko NH35
Seiko NH35
Case
4 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 dial's applied markers for catching light beautifully, adding significant character. The Aigi Watches BARENTS SEA AUTOMATIC round dive watch 43mm, applied markers + date + dive bezel is noted for good specifications at its $199 Kickstarter price. However, some owners express concern about the unknown brand and its chunky dimensions, with a 43mm diameter, 49mm lug-to-lug, and 22mm lugs. Overall, owners find the Aigi Watches BARENTS SEA AUTOMATIC round dive watch 43mm, applied markers + date + dive bezel to be a decent-looking watch with appealing dial details, though brand recognition and size are points of consideration.
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