Borealis Watch Co. Sea Storm MK2 GMTvsCWC RN81 Clearance Diver Automatic
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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.

Sea Storm MK2 GMT

RN81 Clearance Diver Automatic
Diameter
41.5mm
41mm
Lug-to-Lug
48.5mm
47mm
lowest
Thickness
14.2mm
12.7mm
lowest
Water Resistance
300m
300m
MSRP
$415
lowest
$1,875
Movement
Seiko NH34
Sellita SW200-1
Case
3 specsCrystal & Dial
2 specsMovement
1 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
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.
Owners widely praise the CWC RN81 Clearance Diver Automatic Watch for its build quality and comfortable wear, with some appreciating the fixed springbars and historical significance as a tool watch. However, reviewers and owners note the "faux patina" lume color is considered too gold and glossy, and some find the polished case and dial text/logo less appealing. The CWC RN81 Clearance Diver Automatic Watch is also seen as overpriced by some, with concerns raised about the acrylic bezel's durability and import taxes for US buyers. On balance, owners and reviewers value the CWC RN81 Clearance Diver Automatic Watch for its faithful reissue design and historical connection, though price and specific aesthetic choices are points of contention.
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