I have inherited a shotgun from my father. It was old when he got it for free from a friend back in the early 60's.

I have always been told it is a Brno, but all the marks on it are Belgian.

Is there anyone who can tell me something about it?
Year, maker, etc??

Is this a gun I can use with modern ammunition, or should I not use it at all?

Is it worth keeping, or should I try to sell it?

Here in Norway we have strict rules on the number of weapons we can have (maximum 6 guns for hunting), and with this shotgun I am on my limit. Maybe I can change the status of it to collectible, but is it worth keeping?