Help identifying weird WWII casing

[Knouterer]

Some more info on this page:
http://www.quarryhs.co.uk/Historic%20MGs.htm

[Waleed Y. Majeed]

Been following this tread with interest and found some pictures and explanations to the headstamp for comparison. My thoughts are, it’s a pre 1921 dutch cartridge. Possibly a 1899 case with an “F” lot number.
http://militarycartridges.nl/dutch/scherp1.htm
https://ator1149.home.xs4all.nl/wfm/ww1 ... headstamps
Hope the links are of some help.

Waleed

[BunkerOwner2]

Thanks for all the reactions.
This casing is not 6,5mm, so not pre-WOII and Dutch.

It is found at the same location as some other casings and a bullet, at a place where the Germans executed several people...

I found within ca 1,5 meters area;

1 x 7.92×57mm Mannlicher M95 casing
3 x 7.92×57mm Mauser K98 casing
1 x 9x19mm Mauser casing
1 x 9mm bullet

[BunkerOwner2]

Some more pics (also a clip is found at that spot).