Side by side

Fortis Marinemaster M-40vsMarathon GPQ (General Purpose Quartz) Field Watch

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

Marinemaster M-40
FortisMarinemaster M-40
MSRP $3,520
GPQ (General Purpose Quartz) Field Watch
MarathonGPQ (General Purpose Quartz) Field Watch
MSRP $420

At a glance

14 of 29 specs differ
Diameter
Marinemaster M-4040mm
GPQ (General Purpose Quartz) Field Watch34mm
Power Reserve
Marinemaster M-4038h
GPQ (General Purpose Quartz) Field Watch40h
Water Resistance
Marinemaster M-40300m
GPQ (General Purpose Quartz) Field Watch30m
MSRP
Marinemaster M-40$3,520
GPQ (General Purpose Quartz) Field Watch$420

Full specifications

Case

7 specs
Category
Diver
Field
Diameter
40mm
34mm
Thickness
13mm
11.5mm
Lug-to-Lug
41mm
Lug Width
21mm
16mm
Material
Stainless Steel
Fibreshell Composite
Water Resistance
300m
30m

Crystal & Dial

2 specs
Crystal
Sapphire
Acrylic
Dial Color
Orange
Black

Movement

4 specs
Caliber
Sellita SW220-1
Swiss High-Torque Quartz (3J, EOL)
Type
Automatic
Quartz
Power Reserve
38h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$3,520
$420

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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.

Fortis Marinemaster M-40

Owners praise the Fortis Amber Orange for its gorgeous appearance and strong wrist presence, noting its crazy lume and 70-hour power reserve. The Doxa SUB 300T, described as having a superb, eccentric design with a highly legible dial and functional no-decompression bezel, uses an ETA 2824-2 movement. However, the SUB 300T's 42.5mm case wears large and its 14mm thickness is not ideal for dress shirts, though it boasts 1,200m water resistance. On balance, owners appreciate the Fortis Amber Orange for its striking aesthetics and impressive lume.

Marathon GPQ (General Purpose Quartz) Field Watch

Owners widely praise the Marathon GPQ (General Purpose Quartz) Field Watch for its rugged quartz movement, accuracy, and tritium lume. Reviewers and owners alike highlight its solid build, legibility, and comfortable, lightweight wear, making it particularly well-suited for smaller wrists. Some owners, however, consider the price point of $350-420 to be somewhat high. On balance, the consensus is that owners rate the Marathon GPQ (General Purpose Quartz) Field Watch highly for its dependable quartz accuracy and excellent tritium lume.

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