Pietro Beretta Sliver Snipe

Hey there guys I just received a couple of guns from my father in law yesterday and they were his fathers. He gave them to me bc he does not use them and they been sitting for some time now since my wife grandfather passed away like 10-15 years ago. Kind of shocked that he would give me the guns.

I did a little searching on here and Google and only came up with a little info on the shotgun but I would love to find out everything I can on it. I am not looking to sell it I am planning on cleaning it up and taking it to the range.

Here is the info stamped on the gun. Pietro Beretta Sliver Snipe 12 gauge. P.Beretta- Gardone V.T

I can provide the serial number on the gun if needed to find out anything on it. I just want to make sure it is the correct number first. I found a 4 digit 1 letter number on the bottom side of the barrel under the forward grip. Would this be the correct number?

Found out that it was built in 1960. Still trying to get more info on it.