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Fortis · Flieger

Fortis Flieger F-39

Reference F4220005 · Tool · 39 mm

1212456789101114Ø 39 mmLug-to-lug 50 mm
Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference
F4220005
Family
Flieger
Category
Tool
Status
Current
Case material
Stainless steel
Case diameter
39 mm
Case thickness
12.5 mm Official
Lug-to-lug
50 mm Official
Lug width
—
Water resistance
200 m
Bezel
—
Calibre
UW-30 Official
Power reserve
38 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.

1212456789101114Lug-to-lug 50 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 50 mmCase diameter 39 mm
Side view, across the wrist

Comfortable

Lug-to-lug 50 mm on a flat top of 54.1 mm: 92 % of the width.

Lug-to-lug is 75 to 95% of the flat top, the usual comfortable range.

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
12.5 mm Official Fortis October 25, 2026

Lug-to-lug

Value Type Source Date
50 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.

  • F4220015 · Black / Block Bracelet
  • F4220019 · Petrol / Block Bracelet
  • F4220023 · Liberty Blue / Block Bracelet

Other Flieger references

Watch Ø Thickness Lug-to-lug Calibre
Flieger F-39 Werk 7 F4220028 39 mm 12.5 mm 50 mm Werk 7
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-43 Bicompax F4240004 43 mm 15.5 mm 54 mm UW-51

Other Fortis models

Watch Ø Thickness Lug-to-lug Calibre
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
Stratoliner S-41 F2340006 41 mm 14.5 mm 50.5 mm Werk 17
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
Marinemaster M-44 F8120013 44 mm 14 mm 48 mm Werk 11

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