Borealis Watch Co. Sea Storm MK2 GMTvsHeimdallr Sharkey Ocean Monster Diver

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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.

Borealis Watch Co. Sea Storm MK2 GMT at true scale

Sea Storm MK2 GMT

Heimdallr Sharkey Ocean Monster Diver at true scale

Sharkey Ocean Monster Diver

Diameter

41.5mm

41.6mm

Lug-to-Lug

48.5mm

46.6mm

lowest

Thickness

14.2mm

13.6mm

lowest

Water Resistance

300m

highest

200m

MSRP

$415

$139

lowest

Movement

Seiko NH34

Hangzhou 2553A

Case

4 specs
Diameter
41.5mm
41.6mm
Thickness
14.15mm
13.6mm
Lug-to-Lug
48.5mm
46.56mm
Water Resistance
300m
200m

Crystal & Dial

1 specs
Lume
BGW9
Japan SuperLuminova C3 (Green)

Movement

1 specs
Caliber
Seiko NH34
Hangzhou 2553A

Pricing

1 specs
MSRP
$415
$139
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Reviews

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

Borealis Watch Co. Sea Storm MK2 GMT

The Borealis Sea Storm MK2 GMT is noted for its retro aesthetic, featuring modern components, a black and white bezel, and an orange GMT hand. Owners highlight its ample lume and a well-made bracelet. The watch is described as being a relatively thick, yet surprisingly wearable, 41.5mm case size, with a date window that integrates smoothly into the dial. Overall, owners rate the Borealis Sea Storm MK2 GMT highly for its retro vibe and modern execution at its price point.

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.

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