Hello,
I would like to know what the font is. Thank you very much for your answer!

Selectric Elite  Vorgeschlagen von donshottype 
Typewriter  Vorgeschlagen von donshottype 
Tox Typewriter  Vorgeschlagen von gabriel78 

The closest one

Monospaced typewriter letters. Looks like an actual typed note rather than a grunge or distressed font.
If it is an actual typewriter, the regular height suggests it was made by something like an IBM Selectric element [looks like a golfball], rather than metal arms that swing up when the keys are pushed.

A digital Selectric Elite is close on the _g_ but wrong on _w_.

Still looking.

Do you have any information on the approximate year of your specimen?

Typewriter MT is similar.