Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)vsSeiko 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.

1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap)

Prospex Sea 1965 Heritage Diver's Watch
Diameter
38mm
40mm
Lug-to-Lug
46mm
lowest
46.4mm
Thickness
12.8mm
lowest
13mm
Water Resistance
200m
300m
highest
Power Reserve
n/a
72h
MSRP
$238
lowest
$1,300
Movement
Seiko NH35
Seiko 6R55
Case
4 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 Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap) for its superb quality and value, with many calling it a no-brainer purchase. Some owners note the bezel action could be crisper, and one user found shipping fees expensive, though the watch itself was considered on point. The Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive bezel, perforated rubber strap) is reported to keep good time at +5-7 seconds per day. On balance, owners rate the Sheffield 1A 38 dive 38mm, 3-hand date (rotating dive dive bezel, perforated rubber strap) highly for its exceptional quality and affordability.
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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