You really need to post some pictures of this gun. The condition and the engraving will determine the model and the price.

I hate to disagree with Larry, but they are not that rare. Most were made as hunters. By this time frame, Beretta was devoting their better efforts to competition guns. Many were treated rather roughly. I own a Beretta 20ga hammer from about the same era. There is not much of a collector market.

Having said all the above, it is still a Beretta.

Pete