I need your help!

I found old cartridge and I need help. I need to know there its from . Thank you!
Markings:
M38
30
P9
Crown?
M5
1938

I think your case is for Austrian 8cm M5 guns.
Could you show us a better image of the headstamp taken right from above? And before you do just dampen the case so the markings become visible.