Islander Automatic Diver #ISL-18vsSeiko 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.

Automatic Diver #ISL-18

Prospex Sea PADI Special Edition
Diameter
43mm
45mm
Lug-to-Lug
46mm
lowest
52.6mm
Thickness
14mm
13.4mm
lowest
Water Resistance
200m
200m
Power Reserve
n/a
70h
MSRP
$369
lowest
$1,200
Movement
Seiko NH36
Seiko 6R35
Case
5 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Islander Automatic Dive Watch #ISL-18 owners praise its 43mm size, double-domed sapphire crystal with anti-reflective coating, and embossed ceramic bezel. The watch is noted for its quality and weight at its $300 price point, featuring a Seiko NH36 automatic movement with hand-winding and hacking capabilities. On balance, owners rate the Islander Automatic Dive Watch #ISL-18 highly for its robust features and build quality at an accessible price.
Owners widely praise the Seiko Prospex Sea PADI Special Edition for its attractive PADI color scheme and dials, with many noting its robust build quality and excellent lume. Reviewers and owners alike highlight the value proposition, with one owner stating the bracelet exceeds expectations for its price point. Some owners find the watch chunky and potentially top-heavy, while others note the lug-to-lug measurement can be long for smaller wrists. One owner reported that the 6R35 movement in their Alpinist was not great, and another warned about the pin and collar system on the bracelet. Overall, owners and reviewers rate the Seiko Prospex Sea PADI Special Edition highly for its distinctive design and value.
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