Seiko Prospex Sea 1965 Heritage Diver's WatchvsSquale 1545
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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.

Prospex Sea 1965 Heritage Diver's Watch

1545
Diameter
40mm
40mm
Lug-to-Lug
46.4mm
n/a
Thickness
13mm
12mm
lowest
Water Resistance
300m
300m
Power Reserve
72h
highest
38h
MSRP
$1,300
$930
lowest
Movement
Seiko 6R55
Sellita SW200-1
Case
3 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
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.
Owners widely praise the Squale 1545 for its solid build quality, attractive appearance, and excellent value, with many highlighting its impressive tuxedo black lacquer dial and exceptionally bright lume. Some owners note the clasp as a point of dissatisfaction, a common issue across various price points, and one reviewer points out minor flaws on the steel bracelet including soft end links and a clasp that scratches the bracelet. The Squale 1545 is considered a reliable and versatile everyday watch with historical design precedent. Overall, owners and reviewers rate the Squale 1545 highly for its impressive finishing and value at its price point.
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