Addiesdive Tuna DivervsSeiko Seiko 5 Sports SKX series

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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 Diver at true scale

Tuna Diver

Seiko Seiko 5 Sports SKX series at true scale

Seiko 5 Sports SKX series

Diameter

47.5mm

38mm

Lug-to-Lug

n/a

44.2mm

Thickness

15mm

12.1mm

lowest

Water Resistance

300m

highest

100m

Power Reserve

n/a

41h

MSRP

$179

lowest

$350

Movement

Seiko NH35

Seiko 4R36

Case

5 specs
Diameter
47.5mm
38mm
Thickness
15mm
12.1mm
Lug-to-Lug
n/a
44.2mm
Lug Width
22mm
20mm
Water Resistance
300m
100m

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
Dial Color
n/a
n/a
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Seiko NH35
Seiko 4R36
Power Reserve
0h
41h
Jewels
0
24

Pricing

1 specs
MSRP
$179
$350
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Reviews

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

Addiesdive Tuna Diver

Owners widely praise the Addiesdive Tuna Diver 300M MY-H5B for its exceptional value, robust Seiko NH35 movement, and comfortable, legible design. The crown operates smoothly, and the lume application is neat. However, the shroud makes the bezel difficult to grip, and the highly domed crystal introduces significant angular distortion. Some owners question the water resistance claims beyond casual use, and one noted a bezel insert requiring realignment due to quality control. Overall, owners rate the Addiesdive Tuna Diver 300M MY-H5B highly for its unbeatable price-to-performance ratio.

Seiko 5 Sports SKX series

The Seiko 5 Sports SKX series is widely praised as an excellent value gateway watch, with owners and reviewers highlighting its solid build and powerful lume. The 22mm bracelet is noted for its comfort, and the watch offers numerous style options. Some owners find the original SKX models heavy and bulky, while others appreciate their ruggedness and iconic dive watch design. The Seiko 5 Sports SKX series offers an upgraded movement with hacking and hand-winding, and standard spring bars for easier strap changes. However, it lacks the screw-down crown and ISO certification of the original SKX, leading some to consider it less of a tool watch. On balance, owners and reviewers rate the Seiko 5 Sports SKX series highly for its value and modern features, despite some preferring the tool watch capabilities of its predecessor.