You will find more info on the weapon your refering to if you search Beretta TR-1
Other Pietro Beretta 12 gauge rap special shotguns have sold in auction anywhere in the range of $350 USD up to around $500 USD. You could expect more from a private sale or auction of this item, as a gun shop would purchase it for roughly half of its appraised value.
Beretta 390ST(Special Trap)
According to the guide I use, IJ Made a "Special Trap Single Shot Hammer Shotgun" and a "Super Trap Hammerless Double". Both discontinued in 1942.
Impossible to answer without an appraisal
Maybe
Remington 1100 would be just fine for trap. I started with one ans shot for a while until it became a serious hobby. I then spent a lot of money on a very nice trap gun. I shot better and better until I took a break from trap. When I decided to shoot trap again all I had with me was the 1100. Strange thing, I shot just a good with it as I did the spendy gun. Enjoy the game.
7.5 or 8 is recommended
Sorry- one of my reference books has 9 PAGES of Beretta shotguns, and prices vary greatly based on model. I cannot find a trap gun with the markings you list. Please repost with ALL markings on the gun, a full description, and we'll try to get you a real answer.
Special for Women The Glamour Trap - 1961 TV was released on: USA: 16 November 1961
For special entrences.
50-500 USD or so
A Fusion Summon is considered a special summon, so anything that can respond to a special summon (such as Bottomless Trap Hole) can be used against it.