Heimdallr Sharkey Ocean Monster 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.

Heimdallr Sharkey Ocean Monster Diver at true scale

Sharkey Ocean Monster Diver

Phoibos Leviathan at true scale

Leviathan

Diameter

41.6mm

40mm

Lug-to-Lug

46.6mm

lowest

48mm

Thickness

13.6mm

13mm

lowest

Water Resistance

200m

200m

MSRP

$139

lowest

$399

Movement

Hangzhou 2553A

Seiko NH35

Case

3 specs
Diameter
41.6mm
40mm
Thickness
13.6mm
13mm
Lug-to-Lug
46.56mm
48mm

Crystal & Dial

3 specs
AR Coating
n/a
Yes
Dial Color
n/a
Black
Lume
Japan SuperLuminova C3 (Green)
Super-LumiNova

Movement

1 specs
Caliber
Hangzhou 2553A
Seiko NH35

Pricing

1 specs
MSRP
$139
$399
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Reviews

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

Heimdallr Sharkey Ocean Monster Diver

Heimdallr Sharkey Ocean Monster Dive Watch owners praise its looks and lume, with one owner stating it feels even better than the original Seiko Monster it homages. The bezel action is described as clicky with no back play, and the crown is easy to grip and smooth. The watch's opening mechanism is machined rather than pressed, a feature considered excellent for its price point. Some owners note occasional QC issues with chapter rings and find the "Ocean Monster" text on the dial detracts from the aesthetic. One owner reported a negative experience with the store, receiving a watch with serious quality control issues. Accuracy ranges from +6 seconds per day to well-regulated, and while some find the watch comfortable, others note its weight and sharp edges make it uncomfortable. Overall, owners rate the Heimdallr Sharkey Ocean Monster Dive Watch highly for its homage design and bracelet quality, despite some concerns about dial text and occasional quality control.

Phoibos Leviathan

The Phoibos Leviathan is widely praised for its superb case finishing, generous lume, and original design elements, offering excellent value. Owners consistently highlight the quality of the bracelet, including its milled clasp with quick adjustments and on-the-fly microadjustment on newer models, and the visually striking, legible dials. Some owners find the watch heavy and large, with one suggesting a smaller 37mm or 38mm case size would be ideal, and others note the stock rubber strap can be thick and sticky. Accuracy varies, with some reporting it keeps accurate time out of the box, while others note a loss of 5-10 seconds per day without a winder. The bezel's jimping is also flagged as potentially causing fingers to slip. On balance, owners rate the Phoibos Leviathan highly for its robust build, excellent finishing, and desirable features at an accessible price point.

From video reviewers

The case finishing and bezel action are praised. The bracelet, particularly the clasp, is identified as an area for improvement. Reviewers are split on the watch's wrist presence, with some noting its improved 40mm size and others describing it as having a "beast"-like presence.

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