Side by side

Seiko Prospex Sea 1968 Heritage Diver's GMTvsTissot Seastar 1000

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.

Tissot Seastar 1000

Owners widely praise the Tissot Seastar 1000 for its value, solid build, and 300m water resistance, with reviewers highlighting its comfortable wearability and affordable price point for a sporty diver. Some owners find the bezel difficult to use and note glare from the crystal, while others criticize the lume and bracelet quality, with one owner describing the clasp as flimsy. Accuracy figures for the quartz models are excellent, and the Powermatic 80 movement is considered reliable. Overall, owners and reviewers rate the Tissot Seastar 1000 highly for its strong value proposition as a sporty, affordable everyday watch.

From video reviewers

The 80-hour power reserve from the Powermatic 80 movement is a significant strength. Reviewers did not reach a consensus on any weaknesses.

At a glance

12 of 29 specs differ
Diameter
Prospex Sea 1968 Heritage Diver's GMT42mm
Seastar 100040mm
Power Reserve
Prospex Sea 1968 Heritage Diver's GMT72h
Seastar 100080h
Water Resistance
Prospex Sea 1968 Heritage Diver's GMT200m
Seastar 1000300m
MSRP
Prospex Sea 1968 Heritage Diver's GMT$1,500
Seastar 1000$875

Full specifications

Case

4 specs
Diameter
42mm
40mm
Thickness
12.9mm
12.48mm
Lug-to-Lug
48.6mm
40mm
Water Resistance
200m
300m

Crystal & Dial

4 specs
AR Coating
Anti-reflective coating on inner surface
Yes
Dial Color
Graded grey-black
Indices
Indexes
Lume
LumiBrite on hands, index(es) and bezel
Super-LumiNova ®

Movement

3 specs
Caliber
6R54
Tissot Powermatic 80
Power Reserve
72h
80h
Jewels
24
0

Pricing

1 specs
MSRP
$1,500
$875
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