Side by side

Fortis Flieger F-39vsMarathon GPQ (General Purpose Quartz) Field Watch

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

Flieger F-39
FortisFlieger F-39
MSRP $2,530
GPQ (General Purpose Quartz) Field Watch
MarathonGPQ (General Purpose Quartz) Field Watch
MSRP $420

At a glance

12 of 29 specs differ
Diameter
Flieger F-3939mm
GPQ (General Purpose Quartz) Field Watch34mm
Power Reserve
Flieger F-3938h
GPQ (General Purpose Quartz) Field Watch40h
Water Resistance
Flieger F-39200m
GPQ (General Purpose Quartz) Field Watch30m
MSRP
Flieger F-39$2,530
GPQ (General Purpose Quartz) Field Watch$420

Full specifications

Case

6 specs
Category
Pilot
Field
Diameter
39mm
34mm
Lug-to-Lug
46mm
41mm
Lug Width
20mm
16mm
Material
Stainless Steel
Fibreshell Composite
Water Resistance
200m
30m

Crystal & Dial

1 specs
Crystal
Sapphire
Acrylic

Movement

4 specs
Caliber
Sellita SW200-1
Swiss High-Torque Quartz (3J, EOL)
Type
Automatic
Quartz
Power Reserve
38h
40h
Jewels
26
25

Pricing

1 specs
MSRP
$2,530
$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 Flieger F-39

Owners and reviewers widely praise the Fortis Flieger F-39 for its robust build quality, excellent finishing often compared favorably to more expensive watches, and legible utilitarian dial with distinctive color accents. The watch is noted for its precise bidirectional bezel action, excellent lume, and comfortable wearability, with one owner reporting accuracy of 1 second fast per day. Some reviewers flag the 39mm case as wearing large due to its lug-to-lug distance, and the 38-hour power reserve of the Sellita SW 200-1 based UW-30 movement is cited as a limitation, though newer versions feature a 70-hour power reserve. Overall, owners and reviewers highly regard the Fortis Flieger F-39 for its tool watch aesthetic and impressive machining and build quality at its price point.

From video reviewers

The 200m water resistance is a notable strength. Reviewers did not reach a consensus on any weaknesses.

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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