Addiesdive Tuna DivervsSeiko King Turtle
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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 Diver

King Turtle
Diameter
47.5mm
45mm
Lug-to-Lug
n/a
47.7mm
Thickness
15mm
13.2mm
lowest
Water Resistance
300m
highest
200m
Power Reserve
n/a
41h
MSRP
$179
lowest
$650
Movement
Seiko NH35
Seiko 4R36
Case
4 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.
Seiko King Turtle is widely praised for its excellent value and robust design, featuring the reliable 4R36 movement. Owners appreciate its superior lume and a bezel action described as smoother and more precise than some siblings. The 45mm cushion case, while substantial, wears smaller than expected due to its shape and short lug-to-lug distance. On balance, owners and reviewers rate the Seiko King Turtle highly for its proven design and overall value proposition.
The King Turtle's ceramic bezel and sapphire crystal are significant upgrades. Reviewers noted a slight price increase for these features.
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