Islander Black Dial Automatic Diver with DLC CasevsSeiko Prospex Sea
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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.

Black Dial Automatic Diver with DLC Case

Prospex Sea
Diameter
43mm
43.8mm
Lug-to-Lug
46mm
lowest
48.7mm
Thickness
14mm
12.8mm
lowest
Water Resistance
200m
200m
Power Reserve
n/a
41h
MSRP
$429
lowest
$625
Movement
Seiko NH36
Seiko 4R35
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 widely report good value for the money in the Islander Black Dial Automatic Dive Watch with DLC Case #ISL-34, with some finding its case, crystal, and bracelet quality superior to similarly priced non-Prospex Seiko models. Some owners note a lack of "wow" factor and bracelet rattle in competing models. Overall, owners rate the Islander Black Dial Automatic Dive Watch with DLC Case #ISL-34 highly for its build quality and value proposition.
The Seiko Prospex Sea is widely praised for its excellent value as a sport watch, with owners highlighting its comfortable wearability and generous lume. Reviewers note its solid build quality and attractive design, with some specifically mentioning the matte black dial as a strong point. One owner reports accuracy around +1 to +2 seconds per day. The 43.8mm case size is considered substantial by some, and one owner found the watch heavy and thick, regretting not choosing a different variant. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its blend of classic design and modern utility at an accessible price point.
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