Marin Instruments Steel Skin-Diver P (Polar)vsSeiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition
lug2lug doesn't sell watches. Buy links open the brand's or seller's own site. Some links are affiliate links: lug2lug may earn a commission at no extra cost to you. Disclosures
Measurements
Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Steel Skin-Diver P (Polar)

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 specsCrystal & Dial
5 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
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.
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.
Similar watches
Matched to the watches above on size, movement, style and price, microbrands first. Open any one to dig in.










