Heimdallr 41mm Automatic Diver H8vsSquale 1521 Classic COSC


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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.

41mm Automatic Diver H8

1521 Classic COSC
Diameter
41mm
42mm
Lug-to-Lug
n/a
48mm
Thickness
13.3mm
12.5mm
lowest
Water Resistance
200m
500m
highest
Power Reserve
n/a
38h
MSRP
$149
lowest
$1,965
Movement
Hangzhou 2565A
Sellita SW200-1
Case
5 specsCrystal & Dial
3 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Heimdallr 41mm Automatic Dive Watch H8 for its attractive design, solid build quality, and good quality control. The winding action is noted as very smooth, and the movement is generally well-regulated, though one owner reports it running fast at 12-15 seconds per day. Some find the watch uncomfortable due to its weight and sharp edges. Overall, owners rate the Heimdallr 41mm Automatic Dive Watch H8 highly for its aesthetics and build quality at the price point.
Owners widely praise the Squale 1521 Classic COSC's well-proportioned 42mm case, with one reviewer calling it a masterclass in case design. The COSC certification is noted to improve accuracy, and the bezel indices are now fully lumed, a feature some owners find superior. The brushed case with polished chamfers is described as a significant and attractive aesthetic update. However, some owners prefer older bezel designs, and opinions on the lume are mixed, with one user finding it only "okay." One owner reported moisture ingress after a shower due to a loose case back on a new watch. The Squale 1521 Classic COSC is priced at CHF 1,475 and uses a Sellita SW200-1 movement. Overall, owners rate the Squale 1521 Classic COSC highly for its updated finishing and improved accuracy.
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