Heimdallr Sharkey Ocean Monster DivervsSerket Watch Co Reef Mariana

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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

Serket Watch Co Reef Mariana at true scale

Reef Mariana

Diameter

41.6mm

40mm

Lug-to-Lug

46.6mm

lowest

47.5mm

Thickness

13.6mm

13.2mm

lowest

Water Resistance

200m

200m

MSRP

$139

lowest

$449

Movement

Hangzhou 2553A

Seiko NH35

Case

3 specs
Diameter
41.6mm
40mm
Thickness
13.6mm
13.2mm
Lug-to-Lug
46.56mm
47.5mm

Crystal & Dial

2 specs
Dial Color
n/a
Orange
Lume
Japan SuperLuminova C3 (Green)
BGW9

Movement

2 specs
Caliber
Hangzhou 2553A
Seiko NH35
Power Reserve
0h
n/a

Pricing

1 specs
MSRP
$139
$449
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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.

Serket Watch Co Reef Mariana

Owners widely praise the Serket Watch Co Reef Mariana for its excellent value, citing the sapphire crystal, ceramic bezel, and reliable Seiko NH35 automatic movement at its price point. Some owners note the bezel turns too easily and suggest the lume could be stronger. Overall, owners rate the Serket Watch Co Reef Mariana highly for its eye-catching dial and bezel combination and strong feature set for the price.