Seiko Prospex Sea 1965 Heritage Diver's WatchvsSan Martin Compressor Diver

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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

Compressor Diver
Diameter
40mm
42mm
Lug-to-Lug
46.4mm
n/a
Thickness
13mm
n/a
Water Resistance
300m
highest
200m
Power Reserve
72h
n/a
MSRP
$1,300
$273
lowest
Movement
Seiko 6R55
Automatic
Case
5 specsCrystal & Dial
4 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 praise the San Martin Compressor Diver as a favorite with a retro diver character, and one notes the big numerals grow on them, though they regret the original black dial didn't sell better. One owner reports timekeeping of only about 20 seconds gained every 12 days under daily wear with the NH35 movement, which is a strong result for an automatic. Weaker points include lume that one owner finds much weaker than expected for the brand, and a lollipop seconds hand that another considers oversized against the dial. Overall, owners rate the Compressor Diver well for its retro homage character and accuracy, with lume the most notable drawback.
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