Horlobase Search
enfrde

Fortis · Flieger

Fortis Flieger F-43 Bicompax

Reference F4240004 · Chronograph · 43 mm

121245678101114Ø 43 mmLug-to-lug 54 mm
Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference
F4240004
Family
Flieger
Category
Chronograph
Status
Current
Case material
Stainless steel
Case diameter
43 mm
Case thickness
15.5 mm Official
Lug-to-lug
54 mm Official
Lug width
—
Water resistance
200 m
Bezel
—
Calibre
UW-51 Official
Power reserve
60 h

Official product page · retrieved October 25, 2026

Does it fit your wrist?

Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.

121245678101114Lug-to-lug 54 mmFlat top of the wrist 54.1 mm
Top view on a wrist, to scale
Flat top of the wrist 54.1 mmLug-to-lug 54 mmCase diameter 43 mm
Side view, across the wrist

At the limit

Lug-to-lug 54 mm on a flat top of 54.1 mm: 100 % of the width.

Lug-to-lug is 95 to 100% of the flat top. The lugs reach the edge, so check your wrist shape.

Measurements and sources

Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.

Case thickness

Value Type Source Date
15.5 mm Official Fortis October 25, 2026

Lug-to-lug

Value Type Source Date
54 mm Official Fortis October 25, 2026

Lug width

Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.

No source gave this figure yet.

Calibre source

Official Fortis · retrieved October 25, 2026

Other versions in the same case

These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.

  • F4240006 · Black / Block Bracelet
  • F4240008 · Petrol / Block Bracelet
  • F4240012 · Liberty Blue / Block Bracelet
  • F4240010 · Fratello Capsule Edition / Hybrid Strap

Other Flieger references

Watch Ø Thickness Lug-to-lug Calibre
Flieger F-41 F4220008 41 mm 12.5 mm 52 mm UW-30
Flieger F-41 Werk 7 F4220030 41 mm 12.5 mm 52 mm Werk 7
Flieger F-43 Triple-GMT F4260000 43 mm 15.5 mm 54 mm Werk 13
Flieger F-39 F4220005 39 mm 12.5 mm 50 mm UW-30
Flieger F-39 Werk 7 F4220028 39 mm 12.5 mm 50 mm Werk 7

Other Fortis models

Watch Ø Thickness Lug-to-lug Calibre
Novonaut N-42 F2040008 42 mm 15 mm 51 mm Werk 17
Novonaut N-42 TR F2040021 42 mm 15 mm 51 mm Werk 17 TR
Stratoliner S-41 F2340006 41 mm 14.5 mm 50.5 mm Werk 17
Marinemaster M-44 F8120013 44 mm 14 mm 48 mm Werk 11
Marinemaster M-40 F8120024 40 mm 12 mm 43 mm UW-30
Vagabond V-40 F6660000 40 mm 13.9 mm 46.5 mm Werk 13

← All watches