Seiko Prospex Sea Seiko Diver’s Watch 60th Anniversary Limited EditionvsSpinnaker Spence 300
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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.

Prospex Sea Seiko Diver’s Watch 60th Anniversary Limited Edition

Spence 300
Diameter
42mm
40mm
Lug-to-Lug
48.6mm
48mm
lowest
Thickness
13.3mm
11.5mm
lowest
Water Resistance
300m
300m
Power Reserve
72h
n/a
MSRP
$1,750
$650
lowest
Movement
Seiko 6R54
Seiko NH35
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 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.
Owners widely praise the Spinnaker Spence 300 for its slim 10.9mm case and 40mm diameter, offering a comfortable and versatile wear. Reviewers and owners alike highlight its value, with some seeing it as a budget alternative to more expensive dive watches. The watch features a Seiko NH35 automatic movement and 300m water resistance. However, some community members find the dial printing and bracelet finishing to be less refined, and a few suggest other brands offer better value at similar price points. On balance, owners and reviewers rate the Spinnaker Spence 300 highly for its impressive case dimensions and overall value proposition.
The watch's thin 10.9mm profile for a 300m diver is a key strength. No shared weakness was identified.
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