Thank you for the informations, I am very glad, that I could get such a rich knowledge to my gun.
What does unfinished-proof mean on a barrel?
I know the Monte Carlo and the Lámpagyári types, You posted, they were/are both one of the most used shotguns in Hungary.
I post 2 pics about the FÉG Victoria belonged to my father, but there must be other proofmark for the manufacturing date, because I cannot identify it. It should be from the 60's as far as I know