8x50R "V 1920 W"

I picked it up because I was attracted to the headstamp. The seller looked at me incredulously and said:“Just take it”. So here I am, it measures about 8.2x50.6mm. What is it? Is it 8.2x50R? Who is the maker?

Looks like an Austrian 8x50R Mannlicher made by Weiss in Budapest.

Alex, you are probably right about the calibre, I just put it side by side with 8x50R and they look the same.