If you can get access to RL Wilson's book "The World of Beretta" he has some discussion on Beretta's 1920's SxS. The write-up is a little confusing, but it looks like Beretta had a model 922 and model 311 around this timeframe and within the description these may be called Stella, Pigeon Model 7, 1011, 311, 311E. The guns pictured and described show monoblock barrels. Price today is anyone's guess because you don't see them offered for sale.