Squale 1521vsSeiko Prospex Sea PADI Special Edition
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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.

1521

Prospex Sea PADI Special Edition
Diameter
42mm
43.8mm
Lug-to-Lug
n/a
48.7mm
Thickness
12.5mm
lowest
12.8mm
Water Resistance
500m
highest
200m
Power Reserve
38h
41h
highest
MSRP
$1,265
$625
lowest
Movement
Sellita SW200-1
Seiko 4R35
Case
6 specsCrystal & Dial
2 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners widely praise the Squale 1521 for its classic look and robust build, with specific mentions of its wearable 12.5mm thickness and refined case finishing. The 42mm case is noted by some to wear smaller, closer to 40mm, due to short lugs, feeling solid without being too large. However, opinions on the bracelet vary, with some finding it too flashy or stiff, and one owner reported moisture ingress after a shower due to a loose case back. The crown can be difficult to operate due to deep integration, and the 38-hour power reserve is considered old-school but reliable. Overall, owners rate the Squale 1521 highly for its classic design and wearability, despite some reservations about the bracelet and crown.
Owners praise the Seiko Prospex Sea PADI Special Edition for its attractive, jewel-toned teal dial with an ocean-mimicking pattern and LumiBrite for legibility. Some reviewers note the watch offers good value under $1,000 with a rich dial aesthetic and refined case. The 43.8mm case is considered a bit thick by some, and its design can make the watch wear top-heavy and feel larger than its dimensions suggest, with a lug-to-lug that might be long for smaller wrists. The 4R35 movement's stated accuracy range is broad, with some owners seeing +/- 15-25 seconds per day. Overall, owners and reviewers rate the Seiko Prospex Sea PADI Special Edition highly for its vibrant dial and solid build at its price point.
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