Spinnaker Spence 300vsSeiko 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.

Spence 300

Prospex Sea PADI Special Edition
Diameter
40mm
41.7mm
Lug-to-Lug
48mm
lowest
49.5mm
Thickness
11.5mm
lowest
12.3mm
Water Resistance
300m
highest
200m
Power Reserve
n/a
41h
MSRP
$650
$650
Movement
Seiko NH35
Seiko 4R35
Case
5 specsCrystal & Dial
3 specsMovement
3 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
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.
Owners widely praise the Seiko Prospex Sea PADI Special Edition for its value, attractive PADI color scheme, and excellent lume. Reviewers highlight its proven design, strong functionality, and classic Seiko diver charm, with a matte black dial and large markers being a common point of appreciation. The bezel action is noted as being smoother and more precise than previous models, and the build quality is described as amazing. Some owners find the dial's wave pattern a favorite, though it may not stand out without direct light. The movement's stated accuracy range is +45 to -35 seconds per day, and the divers extension is a point of disappointment for some due to difficulty in opening. The bracelet adjustment is also noted as a pain point, though manageable. Overall, owners and reviewers rate the Seiko Prospex Sea PADI Special Edition highly for its exceptional value and classic diver aesthetic.
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