Side by side

Fortis Flieger F-39vsFormex Stratos UTC

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
Stratos UTC
FormexStratos UTC
MSRP $4,663

At a glance

11 of 29 specs differ
Diameter
Flieger F-3939mm
Stratos UTC41mm
Power Reserve
Flieger F-3938h
Stratos UTC42h
Water Resistance
Flieger F-39200m
Stratos UTC100m
MSRP
Flieger F-39$2,530
Stratos UTC$4,663

Full specifications

Case

5 specs
Category
Pilot
GMT
Diameter
39mm
41mm
Thickness
11.5mm
11.8mm
Lug-to-Lug
46mm
47mm
Water Resistance
200m
100m

Crystal & Dial

2 specs
Dial Color
Black
Blue
Lume
None
Super-LumiNova

Movement

3 specs
Caliber
Sellita SW200-1
ETA 2892
Power Reserve
38h
42h
Jewels
26
25

Pricing

1 specs
MSRP
$2,530
$4,663

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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.

Formex Stratos UTC

Owners and reviewers widely praise the Formex Stratos UTC for its user-friendly flyer GMT complication, which utilizes pushers for time-zone adjustments, and its slim 11.8mm case. The watch is noted for its intricate, hand-finished case with a multi-layer construction and excellent finishing, along with a unique two-level case design. The Dubois-Depraz module on an ETA 2892 movement is a highlight, with accuracy figures ranging from +/- 5 to +/- 7 seconds per day. However, some find the dial busy with multiple typefaces and the overall design too complex or "plug ugly," with the price near €4000 considered high by some for a newer brand. Overall, owners and reviewers rate the Formex Stratos UTC highly for its innovative GMT functionality and excellent case finishing at its price point.

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