Squale Squale 50 Atmos Profondo Swiss Diver with Blue Ombre DialvsSeiko Prospex Sea Seiko Diver’s Watch 60th Anniversary Limited Edition

Ref. squale-50-atmos-profondo-swiss-diver-watch-with-blue-ombre-dial-1521profd-sq20b·MSRP $1,448
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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.

Squale 50 Atmos Profondo Swiss Diver with Blue Ombre Dial

Prospex Sea Seiko Diver’s Watch 60th Anniversary Limited Edition
Diameter
42mm
42mm
Lug-to-Lug
n/a
48.6mm
Thickness
n/a
13.3mm
Water Resistance
500m
highest
300m
Power Reserve
n/a
72h
MSRP
$1,448
lowest
$1,750
Movement
Sellita SW200-1
Seiko 6R54
Case
4 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners and reviewers praise the Islander Squale 50 Atmos Profondo Swiss Diver Watch with Blue Ombre Dial #1521PROFD.SQ20B for its blue-to-black ombre dial, bead-blasted case, and excellent legibility. The watch is noted for wearing smaller than its specifications suggest, with one reviewer highlighting its comfortable 40.4mm wearability. Some criticism exists regarding the bezel's light action, which can lead to accidental movement, and the crown's grip and feel are described as cumbersome and imprecise. Overall, owners and reviewers highly regard the Islander Squale 50 Atmos Profondo Swiss Diver Watch with Blue Ombre Dial #1521PROFD.SQ20B for its attractive dial and comfortable wearability.
Owners find the Seiko Prospex Sea Seiko Diver’s Watch 60th Anniversary Limited Edition very pretty with an excellent, non-bulky 42mm case. Reviewers note its upgraded clasp with a new diving suit extension system and a wave-patterned silvery-white dial. However, the price of €1900 for a Seiko 6R54 movement with accuracy of +25/-15 seconds per day is considered too expensive by some, and the 6000-unit production run is not seen as truly limited. On balance, owners and reviewers find the Seiko Prospex Sea Seiko Diver’s Watch 60th Anniversary Limited Edition aesthetically pleasing with a comfortable case, though its value proposition is debated due to the movement's performance and price.
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