Claimcheck  Vorgeschlagen von SashiX 
Mono Condensed Book  Vorgeschlagen von notfon1234 

it looks like it was printed or rounded.

Mono Condensed Book looks very close but the "9" is different as other numbers are. Anyway, thanks for help!

no idea?

It's not a font.

http://www.leibinger-group.com/en/img/products/numbering-machines/numbering-machine_2_gr.jpg

Or just scanned, inkjet printed page