Side by side

Fortis Flieger F-43 BicompaxvsOak & Oscar The Humboldt GMT

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

Flieger F-43 Bicompax
FortisFlieger F-43 Bicompax
MSRP $4,180
The Humboldt GMT
Oak & OscarThe Humboldt GMT
MSRP $2,175

At a glance

17 of 29 specs differ
Diameter
Flieger F-43 Bicompax43mm
The Humboldt GMT39.5mm
Power Reserve
Flieger F-43 Bicompax58h
The Humboldt GMT56 hoursh
Water Resistance
Flieger F-43 Bicompax200m
The Humboldt GMT200m
MSRP
Flieger F-43 Bicompax$4,180
The Humboldt GMT$2,175

Full specifications

Case

8 specs
Category
Chronograph
GMT
Diameter
43mm
39.5mm
Thickness
14.5mm
12.5mm
Lug-to-Lug
46.8mm
Lug Width
22mm
20mm
Material
Stainless Steel
316L Stainless Steel
Finish
Brushed and polished
Brushed
Caseback
Solid
Solid screw-down

Crystal & Dial

4 specs
Crystal Shape
Flat
Double-domed
AR Coating
Inner
Underside
Dial Color
Original
White
Lume
None
Super-LumiNova

Movement

4 specs
Caliber
Sellita SW510 BH a
Sellita SW330
Beat Rate
28,800 vph
4 vph
Power Reserve
58h
56 hoursh
Jewels
27
25

Pricing

1 specs
MSRP
$4,180
$2,175

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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-43 Bicompax

Owners widely praise the Fortis Original for its tool-watch aesthetic, legibility, and robust construction, with many noting excellent lume that lasts all night and precise day/date changes at midnight. The brushed stainless steel case is well-finished, and the 38mm size is considered comfortable and well-weighted despite being smaller than modern watches. Accuracy figures range from +2 seconds/day to +8 seconds/day, and some owners compare Fortis quality favorably to Omega. However, some users find the MSRP too high compared to brands like Sinn and Damasko, and one owner reported internal parts dislodging from a limited edition model. Concerns have also been raised about stripped lug screws on B-42 models and potential parts shortages due to past bankruptcy protection filings. Overall, owners rate the Fortis Original highly for its durable construction and tool-watch functionality at a competitive price point.

Oak & Oscar The Humboldt GMT

Oak & Oscar The Humboldt GMT owners widely praise its exceptional accuracy, often running at or near 0 seconds per day, and its comfortable wearability with subtle design details. The construction quality for the price point, sandwich lume, and anti-magnetic properties are also highlighted. Some owners find the bracelet sizing adjustment slightly awkward, and one noted the lume could be brighter. Overall, owners rate the Oak & Oscar The Humboldt GMT highly for its accuracy and comfortable wearability.

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