belgium browning

i have a made in belgium browning is says FULL 12 SPECIAL STEEL stamped on the barel with some proof marks i will try to describe them in order

1, kg, 0, 4, 0, sideways e rotated 90 degrees counter-clockwise, sideways H rotated 90 degrees counter-clockwise with a star on top, sideways PV with lion standing above it rotated 90 degrees counter-clockwise, looks like a vase, circle with something in the middle i cant make it out

left side of reciever says, FABRIQUE NATIONALE D'ARMES DE GUERRE HERSTAL BELGIQUE

ridgt side of reciever has more proof marks

i dont know much about it can someone help