Aquastar Deepstar IIvsSeiko 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.

Aquastar Deepstar II at true scale

Deepstar II

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

Prospex Sea 1965 Heritage Diver's Watch

Diameter

37mm

40mm

Lug-to-Lug

46mm

lowest

46.4mm

Thickness

12mm

lowest

13mm

Water Resistance

200m

300m

highest

Power Reserve

n/a

72h

MSRP

n/a

$1,300

Movement

Sellita SW290-1

Seiko 6R55

Case

5 specs
Diameter
37mm
40mm
Thickness
12mm
13mm
Lug-to-Lug
46mm
46.4mm
Lug Width
37mm
20mm
Water Resistance
200m
300m

Crystal & Dial

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

Movement

3 specs
Caliber
Sellita SW290-1
Seiko 6R55
Power Reserve
n/a
72h
Jewels
0
24

Pricing

1 specs
MSRP
n/a
$1,300
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Reviews

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

Aquastar Deepstar II

Owners widely praise the Aquastar Deepstar II for its comfortable 37mm wearability, vintage aesthetic, and excellent value. Reviewers and owners alike highlight its smooth-winding Sellita SW290-1 movement, remarkable timekeeping, and legible dial with excellent lume. The updated beads-of-rice bracelet with a diver extension is considered a worthwhile upgrade, and the included grey tropic strap is notably supple. Some owners, however, find the 37mm case diameter too small, despite the 47mm lug-to-lug contributing to a larger perceived wrist presence. One owner dislikes the small seconds subdial, finding it interrupts the dial's aesthetic. Overall, owners and reviewers rate the Aquastar Deepstar II highly for its vintage charm, comfortable wearability, and strong value proposition.

From video reviewers

The vintage design and 37mm case size are praised. The price point is considered a strong point by one reviewer, while another suggests it may limit its appeal.

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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