Side by side

Marathon Steel Navigator SSNAV AutovsSeiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Steel Navigator SSNAV Auto
MarathonSteel Navigator SSNAV Auto
MSRP $1,300

At a glance

13 of 29 specs differ
Diameter
Steel Navigator SSNAV Auto41mm
Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition40.5mm
Power Reserve
Steel Navigator SSNAV Auto40h
Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition70h
Water Resistance
Steel Navigator SSNAV Auto60m
Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition200m
MSRP
Steel Navigator SSNAV Auto$1,300
Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition$1,250

Full specifications

Case

6 specs
Category
Pilot
Diver
Diameter
41mm
40.5mm
Thickness
11.5mm
13.2mm
Lug-to-Lug
48mm
47.6mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
60m
200m

Crystal & Dial

3 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Lume
None
LumiBrite on hands, index(es) and bezel

Movement

3 specs
Caliber
Sellita SW200-1
6R35
Power Reserve
40h
70h
Jewels
25
24

Pricing

1 specs
MSRP
$1,300
$1,250

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What people say

Owners + reviewers, side by side

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

Marathon Steel Navigator SSNAV Auto

The Marathon Steel Navigator SSNAV Auto is praised for its high-accuracy quartz movement, with owners noting its comfort and reliable performance. Reviewers highlight its functional tool-watch appeal, featuring a sandblasted steel case, tritium tubes for constant low-light visibility, and 100-meter water resistance. One owner finds the 41mm case runs a bit small. The Marathon Steel Navigator SSNAV Auto utilizes an ETA F06.412 quartz movement with a claimed accuracy of +/- 10 seconds per year and includes a GMT bidirectional bezel. Overall, owners and reviewers rate the Marathon Steel Navigator SSNAV Auto highly for its comfortable wear and dependable, high-accuracy quartz movement.

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 its 44mm lug-to-lug measurement is perfect for most wrists. The dial is inspired by Okinawa's ocean colors and is expected to feature a bright sunburst effect. Accuracy figures for the 6R35 movement range from -10/+10 seconds per day when off/on the wrist, which some find "pretty amazing." However, some owners consider the price of around 1500€ too high, suggesting a value closer to 900€, and there are mixed reports on the 6R movement's accuracy. Overall, owners rate the Seiko Prospex Sea 1965 Heritage Diver's Save the Ocean Special Edition highly for its distinctive dial and wearability, despite some reservations about its price point.

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