Islander Automatic Diver #ISL-18vsSeiko Prospex Sea Save the Ocean Special Edition

lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures

Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Islander Automatic Diver #ISL-18 at true scale

Automatic Diver #ISL-18

Seiko Prospex Sea Save the Ocean Special Edition at true scale

Prospex Sea Save the Ocean Special Edition

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

$369

lowest

$650

Movement

Seiko NH36

Seiko 4R35

Case

4 specs
Diameter
43mm
43.8mm
Thickness
14mm
12.8mm
Lug-to-Lug
46mm
48.7mm
Caseback
Engraved screw-in back
n/a

Crystal & Dial

3 specs
Crystal Shape
Double Domed
n/a
AR Coating
Yes
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH36
Seiko 4R35
Power Reserve
0h
41h
Jewels
0
23

Pricing

1 specs
MSRP
$369
$650
Keep your wishlist and collection together in the appExplore the app

Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Islander Automatic Diver #ISL-18

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.

Seiko Prospex Sea Save the Ocean Special Edition

The Seiko Prospex Sea Save the Ocean Special Edition is widely praised for its exceptional and beautiful dial designs, featuring wave patterns, gradient blues, and marine animal motifs that evoke the ocean, with many considering them among the best in their price range. Owners also note satisfactory lume, smooth bezel operation, and comfortable wearability, with some finding the 43.8mm case size and 13mm thickness to be well-balanced for daily wear. However, multiple sources criticize the bracelet clasp as flimsy, rattly, or underwhelming, and one owner reported returning the watch due to this. Some owners also note imperfect day/date wheel alignment as a common issue in this price segment. On balance, owners and reviewers rate the Seiko Prospex Sea Save the Ocean Special Edition highly for its stunning dial artistry and overall value.

Similar watches

Matched to the watches above on size, movement, style and price, microbrands first. Open any one to dig in.

DiscussionNot started

Also compared

Comparisons nearby in the catalog: alternatives to the watches above paired against the matchup.