Side by side

Marathon Steel Navigator SSNAV AutovsSugess MoonPhase Master S437

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
MoonPhase Master S437
SugessMoonPhase Master S437
MSRP $549

At a glance

14 of 29 specs differ
Diameter
Steel Navigator SSNAV Auto41mm
MoonPhase Master S43740mm
Power Reserve
Steel Navigator SSNAV Auto40h
MoonPhase Master S43748h
Water Resistance
Steel Navigator SSNAV Auto60m
MoonPhase Master S43750m
MSRP
Steel Navigator SSNAV Auto$1,300
MoonPhase Master S437$549

Full specifications

Case

8 specs
Category
Pilot
Chronograph
Diameter
41mm
40mm
Thickness
11.5mm
13.5mm
Lug-to-Lug
48mm
47.8mm
Lug Width
20mm
22mm
Material
316L Stainless Steel
Stainless Steel/Rose Gold
Water Resistance
60m
50m
Caseback
Solid
Display

Crystal & Dial

2 specs
Dial Color
Black
White
Lume
None
X1

Movement

3 specs
Caliber
Sellita SW200-1
ST2528
Power Reserve
40h
48h
Complications
None
Moonphase, Date

Pricing

1 specs
MSRP
$1,300
$549

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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.

Sugess MoonPhase Master S437

Owners widely praise the Sugess MoonPhase Master S437 for its striking dial, often described as deep blue or aventurine, and its value, with prices around $171-$175. The Seagull ST1908 movement is noted as accurate, with one owner reporting +3 seconds over 18 hours and another +7 seconds daily, and its hand-winding action is smooth. However, the watch's thickness, potentially over 13mm, is a concern for some as a dress watch, and the long lugs may pose a fit issue on smaller wrists. A potential design flaw in the moonphase window, showing two phases simultaneously, is flagged as a deal-breaker by some. The included leather straps are considered stiff and uncomfortable, and the domed sapphire crystal lacks AR coating, leading to reflections. On balance, owners rate the Sugess MoonPhase Master S437 highly for its stunning dial and value, despite some fit and finishing concerns.

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