Side by side

Islander Islander JFK Automatic GMT Watch with Batman Dial #ISL-338vsSeestern S450 Ocean Star

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Islander JFK Automatic GMT Watch with Batman Dial #ISL-338
IslanderIslander JFK Automatic GMT Watch with Batman Dial #ISL-338
MSRP $429
S450 Ocean Star
SeesternS450 Ocean Star
MSRP $299
What people say

Owners + reviewers, side by side

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

Islander JFK Automatic GMT Watch with Batman Dial #ISL-338

Owners widely praise the Islander JFK Automatic GMT Watch with Batman Dial #ISL-338 for its attractive dial texture and Pepsi bezel, with some finding the gold-tone accents and overall aesthetic to be a standout feature. The watch is also noted for its comfortable wearability and a useful GMT function, making it a popular choice for daily wear and vacations, further supported by its 200m water resistance. On balance, owners rate the Islander JFK Automatic GMT Watch with Batman Dial #ISL-338 highly for its visually appealing design and practical features at its price point.

Seestern S450 Ocean Star

Owners widely praise the Seestern S450 Ocean Star's Yachtmaster-style case and flawless bracelet finishing, with one owner noting the ST2130 movement keeps good time. The bezel action is described as having individual notches but feeling like a friction bezel, while another owner flags the bezel and crown action as smooth with perfect alignment. Lume is a point of contention, with one source describing it as a nice cool blue with ice-white application, while others note it as weak or not matching Prospex standards, despite using BGW-9. The watch is considered a "big boy" ideal for larger wrists (19cm+), potentially too large for 17cm wrists due to its size and non-tapering bracelet. Overall, owners rate the Seestern S450 Ocean Star highly for its build quality and finishing at the price point, despite some reservations about its size and lume intensity.

At a glance

19 of 29 specs differ
Diameter
Islander JFK Automatic GMT Watch with Batman Dial #ISL-33842mm
S450 Ocean Star40mm
Power Reserve
Islander JFK Automatic GMT Watch with Batman Dial #ISL-338
S450 Ocean Star41h
Water Resistance
Islander JFK Automatic GMT Watch with Batman Dial #ISL-338200m
S450 Ocean Star100m
MSRP
Islander JFK Automatic GMT Watch with Batman Dial #ISL-338$429
S450 Ocean Star$299

Full specifications

Case

8 specs
Category
GMT
Diver
Diameter
42mm
40mm
Thickness
14.5mm
12mm
Lug-to-Lug
47.8mm
48mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Water Resistance
200m
100m
Caseback
Screw-down
Solid

Crystal & Dial

5 specs
Crystal Shape
Domed
Flat
AR Coating
Underside
Inner
Dial Color
White
Indices
Applied
Lume
None
Tritium

Movement

5 specs
Caliber
Seiko NH34
TMI NH35A
Beat Rate
0 vph
21,600 vph
Power Reserve
0h
41h
Jewels
0
24
Complications
None
GMT, Date

Pricing

1 specs
MSRP
$429
$299
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