Side by side

Phoibos LeviathanvsSeiko Monster

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Leviathan
PhoibosLeviathan
MSRP $399
Monster
SeikoMonster
MSRP $550

At a glance

10 of 29 specs differ
Diameter
Leviathan40mm
Monster42.4mm
Power Reserve
Leviathan40h
Monster41h
Water Resistance
Leviathan200m
Monster200m
MSRP
Leviathan$399
Monster$550

Full specifications

Case

3 specs
Diameter
40mm
42.4mm
Thickness
13mm
13.4mm
Lug-to-Lug
48mm
49.4mm

Crystal & Dial

3 specs
Crystal
Sapphire
Hardlex
AR Coating
Yes
Inner
Lume
Super-LumiNova
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
SII NH35
4R36
Power Reserve
40h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$399
$550

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What people say

Owners + reviewers, side by side

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

Phoibos Leviathan

Owners widely praise the Phoibos Leviathan for its excellent value, superb case finishing, and generous lume. The watch is described as visually striking, legible, and well-made, with a unique case design, sapphire crystal, and a comfortable FKM strap or excellent bracelet with a milled clasp and quick adjustments. Some owners note the bezel's staggered jimping can cause fingers to slip, and the beveled crystal can distort the view of indices. Accuracy varies, with one owner reporting losing 5-10 seconds per day without a winder, while others state it keeps accurate time out of the box. The watch is frequently described as heavy and thick, with some owners finding it too large for wrists smaller than 7.5 inches, although newer models feature an improved clasp for better comfort and functionality. Overall, owners rate the Phoibos Leviathan highly for its striking design and impressive finishing at an accessible price point.

Seiko Monster

Owners widely praise the Seiko Prospex Sea for its excellent value, robust build, and superb lume, with many noting its comfortable wearability. Reviewers consistently highlight its impressive finishing and classic dive watch design, often comparing it favorably to older models. Some owners find the size substantial, with one noting it as big, thick, and heavy on a 6.5-inch wrist, while others find it perfect. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional value and robust, classic dive watch design.

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