Marin Instruments Steel Skin-Diver P (Polar)vsSeiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition

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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.

Marin Instruments Steel Skin-Diver P (Polar) at true scale

Steel Skin-Diver P (Polar)

Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition at true scale

Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition

Diameter

39mm

40.5mm

Lug-to-Lug

n/a

47.6mm

Thickness

n/a

13.2mm

Water Resistance

200m

200m

Power Reserve

n/a

70h

MSRP

$1,295

$1,250

lowest

Movement

Sellita SW200-1

Seiko 6R35

Case

5 specs
Diameter
39mm
40.5mm
Thickness
n/a
13.2mm
Lug-to-Lug
n/a
47.6mm
Lug Width
n/a
20mm
Material
n/a
Stainless Steel

Crystal & Dial

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

Movement

3 specs
Caliber
Sellita SW200-1
Seiko 6R35
Power Reserve
0h
70h
Jewels
0
24

Pricing

1 specs
MSRP
$1,295
$1,250
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Reviews

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

Marin Instruments Steel Skin-Diver P (Polar)

Owners widely praise the Marin Instruments Steel Skin-Diver P (Polar) for its appealing design language and comfortable wearability, with many calling it a great do-it-all watch. Reviewers highlight its legible dial, smooth-action bezel, and practical, utilitarian design. Some owners find the 39mm case size perfect and appreciate the 20mm lugs for strap versatility. The watch features drilled lugs for easy strap changes and a Sellita SW200-1 movement that kept good time, running at approximately +5 seconds per day in testing. However, some find the steel bezel and dial color combination unremarkable, and one owner noted the lume was merely okay compared to other brands. The $1,295 price for the stainless steel bezel version was considered a significant con by one owner, while another found it well-priced. The 39mm case, while 11.5mm thin, wears larger due to its long lugs, and thicker straps can make it feel bulky.

Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition

Owners widely praise the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition for its unique dial color and execution, with one owner noting the 44mm lug-to-lug is perfect for most wrists. The watch is considered a refined piece with a fun factor, featuring a dial inspired by Okinawa's ocean colors expected to have a bright sunburst effect. Accuracy figures for the 6R35 movement range, with one owner reporting -10/+10 seconds per day as "pretty amazing," while others note issues with the 6R movement's accuracy. Some owners find the price of 1500€ too high, suggesting a value closer to 900€. On balance, owners and reviewers rate the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition well for its dial execution and wearability, despite some debate over its price point.