Heimdallr Sharkey Mini Turtle DivervsPhoibos Leviathan

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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.

Sharkey Mini Turtle Diver

Leviathan
Diameter
45.5mm
45mm
Lug-to-Lug
47.7mm
lowest
54mm
Thickness
13.3mm
lowest
15.5mm
Water Resistance
200m
500m
highest
MSRP
$149
lowest
$309
Movement
Hangzhou 2553A
Seiko NH35
Case
4 specsCrystal & Dial
3 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Heimdallr SHARKEY Mini Turtle Dive Watch for its excellent finishing and surprising reliability, with many noting its good wearability and comfortable fit for its 45.5mm case size. The lume is generally considered strong, and the included rubber strap is well-regarded, with some owners opting to keep it. Accuracy figures vary, with one owner reporting +6 seconds per day and another seeing +-2 seconds per day, while one owner experienced losing a couple of minutes daily with poor lume. The bezel action is described as not as refined as higher-end watches, and one owner noted a slightly misaligned bezel. Overall, owners rate the Heimdallr SHARKEY Mini Turtle Dive Watch highly for its value, build quality, and satisfying Turtle-style aesthetic.
The Phoibos Leviathan is noted for its sturdy, well-made construction and vintage aesthetic, offering a conservative design at an affordable price. Owners report the 45mm case feels heavy and thick at 15.5mm, with one owner replacing the stock band. The watch features a grey dial and blue lume. Overall, owners find the Phoibos Leviathan to be a well-built, vintage-inspired watch at an accessible price point.
The watch features 500m water resistance and a Seiko NH35 automatic movement. The case size is a point of contention, with reviewers noting it is substantial and may overwhelm smaller wrists, while others highlight a 40mm case size as an improvement.
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