Side by side

Fortis Flieger F-43 BicompaxvsLongines ULTRA-CHRON CLASSIC

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
ULTRA-CHRON CLASSIC
LonginesULTRA-CHRON CLASSIC
MSRP $3,900

At a glance

21 of 29 specs differ
Diameter
Flieger F-43 Bicompax43mm
ULTRA-CHRON CLASSIC37mm
Power Reserve
Flieger F-43 Bicompax58h
ULTRA-CHRON CLASSIC52h
Water Resistance
Flieger F-43 Bicompax200m
ULTRA-CHRON CLASSIC50m
MSRP
Flieger F-43 Bicompax$4,180
ULTRA-CHRON CLASSIC$3,900

Full specifications

Case

8 specs
Category
Chronograph
Diameter
43mm
37mm
Thickness
14.5mm
10.95mm
Lug-to-Lug
44.6mm
Lug Width
22mm
19mm
Finish
Brushed and polished
Water Resistance
200m
50m
Caseback
Solid
Screw-down case back

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Both sides
Dial Color
Original
Silver
Indices
Applied
Applied indexes
Lume
None
Super-LumiNova

Movement

7 specs
Caliber
Sellita SW510 BH a
L836.6
Beat Rate
28,800 vph
36,000 vph
Power Reserve
58h
52h
Jewels
27
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
Hours, minutes, seconds and date

Pricing

1 specs
MSRP
$4,180
$3,900

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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.

Longines ULTRA-CHRON CLASSIC

The Longines ULTRA-CHRON CLASSIC is widely praised for its faithful retro design, high-beat 5Hz movement offering greater precision and a smooth seconds hand, and its value proposition as a new 5Hz watch. Reviewers highlight the L836.6 caliber's TimeLab "ultra chronometer" certification for superior accuracy and shock recovery, and owners find the bracelet very comfortable with easy micro-adjust. Some owners note the design appears dated, and one reviewer points out the dial lacks luminescence and water resistance is only 50m. Owners are split on sizing, with some finding the 40mm case wears larger than expected and recommending the 37mm version. Overall, owners and reviewers rate the Longines ULTRA-CHRON CLASSIC highly for its blend of vintage aesthetics, modern high-beat movement performance, and comfortable wearability.

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