Unknown 7,9 Mauser cartridges

Over the years I found these similar cartridges on different shows.
The cases were all made by “am” (Hirtenberg) and the bullet tip is not looking German to me.
None of them has primer crimps.
The first two has a green tip and the third is cn plated with an additional bullet crimp in the case.

Are export orders known from this time aria?

All information is welcome.