Seestern Ocean Star S450-2.ECvsSeiko Prospex Sea 1965 Heritage Diver's Watch

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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.

Seestern Ocean Star S450-2.EC at true scale

Ocean Star S450-2.EC

Seiko Prospex Sea 1965 Heritage Diver's Watch at true scale

Prospex Sea 1965 Heritage Diver's Watch

Diameter

40mm

40mm

Lug-to-Lug

n/a

46.4mm

Thickness

n/a

13mm

Water Resistance

100m

300m

highest

Power Reserve

n/a

72h

MSRP

$225

lowest

$1,300

Movement

Automatic

Seiko 6R55

Case

4 specs
Thickness
n/a
13mm
Lug-to-Lug
n/a
46.4mm
Lug Width
n/a
20mm
Water Resistance
100m
300m

Crystal & Dial

4 specs
Crystal Shape
n/a
Curved
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
n/a
n/a
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
n/a
Seiko 6R55
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$225
$1,300
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Reviews

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

Seestern Ocean Star S450-2.EC

Owners widely praise the Seestern Ocean Star S450-2.EC's bracelet and clasp, calling them exemplary for the price. One owner notes the overall quality and its automatic Seiko NH35 movement, finding it a compelling alternative for those seeking a Doxa-like aesthetic. A reviewer suggests improvements could be made to the case finishing and handset size, while highlighting the desirable cast lume. Overall, owners rate the Seestern Ocean Star S450-2.EC highly for its exceptional bracelet and clasp at the price point, with the cast lume also being a noted positive.

Seiko Prospex Sea 1965 Heritage Diver's Watch

Owners widely praise the Seiko Prospex Sea 1965 Heritage Diver's Watch for its refined engineering, comfortable 40mm case, and improved 300m water resistance. The watch is noted for its better build quality and finishing compared to some alternatives, featuring a mix of polished and brushed surfaces, with specific callouts for the jewel-toned teal dial with a rippling-water pattern. Some owners consider the price fair, while others suggest it is too high. Accuracy figures vary, with some owners reporting their 6R55 movement performs well within +/- 10 seconds per day, while others note theirs runs slow or have concerns about QC for the price. The bracelet, while improved, lacks modern features like quick-release or extensive micro-adjustments. Overall, owners and reviewers rate the Seiko Prospex Sea 1965 Heritage Diver's Watch highly for its refined design and build quality at its price point.

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