Seiko Prospex Sea 1968 Heritage Diver's GMTvsSpinnaker Hass Automatic

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Measurements

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

Seiko Prospex Sea 1968 Heritage Diver's GMT at true scale

Prospex Sea 1968 Heritage Diver's GMT

Spinnaker Hass Automatic at true scale

Hass Automatic

Diameter

42mm

43mm

Lug-to-Lug

48.6mm

lowest

50mm

Thickness

12.9mm

lowest

16.5mm

Water Resistance

200m

300m

highest

Power Reserve

72h

n/a

MSRP

$1,500

$445

lowest

Movement

Seiko 6R54

Seiko NH35

Case

6 specs
Diameter
42mm
43mm
Thickness
12.9mm
16.5mm
Lug-to-Lug
48.6mm
50mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
n/a
Dial Color
n/a
Flying Dutchman
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
Seiko 6R54
Seiko NH35
Power Reserve
72h
0h
Jewels
24
0

Pricing

1 specs
MSRP
$1,500
$445
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Reviews

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 value, with owners noting its comfortable wearability and attractive aesthetic, particularly the silver/white sunray dial and blue ceramic bezel. The improved bracelet clasp with excellent micro-adjustment is a recurring positive point. Some owners report accuracy figures of +3 seconds per day or +/- 5 seconds per day, exceeding the movement's stated range. However, the GMT functionality is considered secondary to its dive watch capabilities by some, with the GMT scale being difficult to read and the caller-style GMT movement being a drawback for certain users. The dial contrast is also noted as lacking by some, and the crown at 4 o'clock is undesirable for a few. On balance, owners and reviewers rate the Seiko Prospex Sea 1968 Heritage Diver's GMT highly for its blend of dive watch character and GMT functionality, offering significant features for its price.

Spinnaker Hass Automatic

Owners widely praise the Spinnaker Hass Automatic for its quality and vibrant dial options at an accessible price point. The watch features a Seiko NH35 automatic movement and 300m water resistance. Some owners find Spinnaker watches, including the Hass Automatic, to be on the thicker side, with one user noting a previous model was considered comically large. One owner reported a quality issue with a different Spinnaker model where the crown detached. Overall, owners rate the Spinnaker Hass Automatic highly for its impressive build quality and fun aesthetic relative to its price.

From video reviewers

The dial's recovered marine plastic construction with textured finish provides distinctive material differentiation at the entry-level dive watch price point, and the sapphire crystal with anti-reflective coating ensures strong on-wrist legibility. The 300m water resistance and automatic movement deliver capable specifications, though bracelet quality and fit remain underspecified across reviews.

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