Phoibos LeviathanvsSeagull Ocean Series Pro 300m Waterproof Diving Watch 44mm
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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.

Leviathan

Ocean Series Pro 300m Waterproof Diving Watch 44mm
Diameter
45mm
44mm
Lug-to-Lug
54mm
51mm
lowest
Thickness
15.5mm
13.5mm
lowest
Water Resistance
500m
highest
300m
MSRP
$309
lowest
$499
Movement
Seiko NH35
Seagull ST2130
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.
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.
Owners praise the quick-release spring bars on the Seagull Ocean Series Pro 300m Waterproof Diving Watch 44mm for simplifying strap changes. The 44mm case is noted as large, though one owner found it fit their wrist well, and the 60-click unidirectional bezel is a familiar feature. Fit, finish, and general quality are considered comparable to a Movado Series 800. On balance, owners rate the Seagull Ocean Series Pro 300m Waterproof Diving Watch 44mm positively for its thoughtful features and build quality at its price point.
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