Side by side

Fortis Flieger F-43 BicompaxvsTudor Black Bay One 31

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
Black Bay One 31
TudorBlack Bay One 31
MSRP $4,600

At a glance

13 of 29 specs differ
Diameter
Flieger F-43 Bicompax43mm
Black Bay One 3131mm
Power Reserve
Flieger F-43 Bicompax58h
Black Bay One 3150h
Water Resistance
Flieger F-43 Bicompax200m
Black Bay One 31100m
MSRP
Flieger F-43 Bicompax$4,180
Black Bay One 31$4,600

Full specifications

Case

8 specs
Category
Chronograph
Diver
Diameter
43mm
31mm
Thickness
14.5mm
9.5mm
Lug-to-Lug
46mm
Lug Width
22mm
17mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
200m
100m
Caseback
Solid
Solid screw-down

Crystal & Dial

1 specs
Dial Color
Original
Anthracite

Movement

3 specs
Caliber
Sellita SW510 BH a
MT5201
Power Reserve
58h
50h
Jewels
27
25

Pricing

1 specs
MSRP
$4,180
$4,600

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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.

Tudor Black Bay One 31

Owners widely report the Tudor Black Bay One 31's polished case and bracelet scratch easily, though its wearability under gloves and robust movement are praised. Some desire more micro-adjustment options on the clasp, and a lack of contrast between the silver dial and hands is noted. The 31mm size may be a consideration for daily wear due to its 50-hour power reserve. On balance, owners and reviewers appreciate the Tudor Black Bay One 31 for its comfortable wearability and robust movement, despite concerns about case scratching and clasp adjustability.

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