Side by side

Seiko Prospex Sea 1968 Heritage Diver's GMTvsHELM Vanuatu

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

What people say

Owners + reviewers, side by side

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

Seiko Prospex Sea 1968 Heritage Diver's GMT

The Seiko Prospex Sea 1968 Heritage Diver's GMT is widely praised for its build quality, finishing, and comfortable wearability, offering good value for its price point. Owners and reviewers highlight the attractive silver/white sunray dial, blue ceramic bezel, and the premium feel of the improved bracelet clasp with excellent micro-adjustment. The Caliber 6R54 movement provides a 72-hour power reserve, and real-world accuracy often exceeds its stated range of +25 to -15 seconds per day, with some owners reporting figures around +3 to +5 seconds per day. However, the caller-style GMT functionality is a point of contention for some, who find the GMT scale difficult to read and prefer a flyer GMT at this price. Some also find the crown position at 4 o'clock undesirable, and a few note a lack of dial contrast or illegibility of the inner bezel.

HELM Vanuatu

Owners widely praise the HELM Vanuatu for its exceptional comfort, with the titanium bracelet frequently cited as "uber-comfortable" and the watch itself being less overbearing on the wrist than comparable dive watches. Reviewers note its great bezel action and overall quality, with one owner finding the purchase satisfactory despite a nearly two-year wait. On balance, owners rate the HELM Vanuatu highly for its wearability and solid build at the price.

From video reviewers

The case finishing is consistently praised. The bracelet is noted as having significant rattle.

At a glance

11 of 29 specs differ
Diameter
Prospex Sea 1968 Heritage Diver's GMT42mm
Vanuatu42mm
Power Reserve
Prospex Sea 1968 Heritage Diver's GMT72h
Vanuatu40h
Water Resistance
Prospex Sea 1968 Heritage Diver's GMT200m
Vanuatu300m
MSRP
Prospex Sea 1968 Heritage Diver's GMT$1,500
Vanuatu$285

Full specifications

Case

4 specs
Thickness
12.9mm
14mm
Lug-to-Lug
48.6mm
50mm
Lug Width
20mm
22mm
Water Resistance
200m
300m

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
Yes
Dial Color
Black
Lume
LumiBrite on hands, index(es) and bezel
Super-LumiNova

Movement

3 specs
Caliber
6R54
Seiko Instruments NH35
Power Reserve
72h
40h
Complications
None
Date

Pricing

1 specs
MSRP
$1,500
$285
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