Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited EditionvsSpinnaker 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 1970 Heritage Diver's Black Series Limited Edition at true scale

Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

Spinnaker Hass Automatic at true scale

Hass Automatic

Diameter

44mm

43mm

Lug-to-Lug

49.3mm

lowest

50mm

Thickness

13mm

lowest

16.5mm

Water Resistance

200m

300m

highest

Power Reserve

50h

n/a

MSRP

$3,300

$445

lowest

Movement

Seiko 8L35

Seiko NH35

Case

6 specs
Diameter
44mm
43mm
Thickness
13mm
16.5mm
Lug-to-Lug
49.3mm
50mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
300m

Crystal & Dial

4 specs
Crystal Shape
Curved
n/a
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 8L35
Seiko NH35
Power Reserve
50h
0h
Jewels
26
0

Pricing

1 specs
MSRP
$3,300
$445
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Reviews

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

Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition

Owners widely praise the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition for its attractive dial with a jewel-toned teal color and rippling-water pattern, and its smooth bezel action. Some owners find it a refined evolution of previous models with a comfortable case and bracelet. However, a significant number of owners express disappointment with the accuracy of the 6R movement at its price point, with some noting it runs slow. The steep rehaut and marker size make the 24-hour numbers difficult to read, and the case design is described as making the watch feel top-heavy. On balance, owners rate the Seiko Prospex Sea 1970 Heritage Diver's Black Series Limited Edition highly for its striking dial and refined design, despite widespread concerns about the movement's accuracy for the 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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