Side by side

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

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
Prospex Sea
SeikoProspex Sea
MSRP $900
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.

Seiko Prospex Sea

Owners widely praise the Seiko Prospex Sea for its excellent lume, robust build, and value, with many highlighting the comfortable 4 o'clock crown and reliable movements. Reviewers note impressive case finishing and attractive dials, with specific models lauded for their gradient blue designs and smooth bezel actions. Accuracy figures vary, with one owner reporting +9 seconds/day after demagnetization, while others find the watches to be good first "proper" watches. Some owners find the stock rubber straps uncomfortable or the overall size substantial on smaller wrists. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its combination of strong dive watch functionality and appealing design at its price point.

At a glance

16 of 29 specs differ
Diameter
Islander JFK Automatic GMT Watch with Batman Dial #ISL-33842mm
Prospex Sea41mm
Power Reserve
Islander JFK Automatic GMT Watch with Batman Dial #ISL-338
Prospex Sea70h
Water Resistance
Islander JFK Automatic GMT Watch with Batman Dial #ISL-338200m
Prospex Sea200m
MSRP
Islander JFK Automatic GMT Watch with Batman Dial #ISL-338$429
Prospex Sea$900

Full specifications

Case

6 specs
Category
GMT
Diver
Diameter
42mm
41mm
Thickness
14.5mm
12.3mm
Lug-to-Lug
47.8mm
46.9mm
Finish
Brushed and polished
Caseback
Screw-down
Solid

Crystal & Dial

5 specs
Crystal Shape
Domed
Curved
AR Coating
Underside
Anti-reflective coating on inner surface
Dial Color
Black
Indices
Applied
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

4 specs
Caliber
Seiko NH34
6R35
Beat Rate
0 vph
28,800 vph
Power Reserve
0h
70h
Jewels
0
24

Pricing

1 specs
MSRP
$429
$900
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