Addiesdive Tuna DivervsSeiko Seiko 5 Sports SKX series
lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures
Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Tuna Diver

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 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
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.
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.
Similar watches
Matched to the watches above on size, movement, style and price, microbrands first. Open any one to dig in.
Also compared
Comparisons nearby in the catalog: alternatives to the watches above paired against the matchup.








