San Martin Sub Diver SN017vsSeiko 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.

San Martin Sub Diver SN017 at true scale

Sub Diver SN017

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

Prospex Sea 1965 Heritage Diver's Watch

Diameter

40.5mm

40mm

Lug-to-Lug

n/a

46.4mm

Thickness

13mm

13mm

Water Resistance

200m

300m

highest

Power Reserve

n/a

72h

MSRP

$161

lowest

$1,300

Movement

Seiko NH35

Seiko 6R55

Case

3 specs
Diameter
40.5mm
40mm
Lug-to-Lug
n/a
46.4mm
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
n/a
n/a
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Seiko NH35
Seiko 6R55
Power Reserve
0h
72h
Jewels
0
24

Pricing

1 specs
MSRP
$161
$1,300
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Reviews

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

San Martin Sub Diver SN017

Owners widely praise the San Martin SN017 for its superb finishing and value, with many noting its impressive build quality for the price. Some owners report exceptional timekeeping and lume, while others find the case and bracelet edges sharp, causing discomfort. Recent V3 units have shown date window misalignment issues, a departure from earlier versions. One owner found the bezel action to be poor, though another confirmed flawless performance on multiple scuba dives. Overall, owners rate the San Martin SN017 highly for its impressive finishing and features at a low price point.

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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