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.

Addiesdive Tuna 300M Automatic Dive Watch AD2509 at true scale

Tuna 300M Automatic Dive Watch AD2509

Audaz Sea Ranger ADZ-2050 at true scale

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 specs
Diameter
41mm
42mm
Thickness
15mm
14.5mm
Lug-to-Lug
44.5mm
50mm
Water Resistance
300m
200m

Crystal & Dial

1 specs
Dial Color
n/a
Black

Movement

1 specs
Power Reserve
0h
n/a

Pricing

1 specs
MSRP
$139
$375
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Addiesdive Tuna 300M Automatic Dive Watch AD2509

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.

Audaz Sea Ranger ADZ-2050

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.

From video reviewers

The watch features a 42mm case, sapphire crystal, ceramic bezel, and 200m water resistance. Swiss Superluminova provides illumination.

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