I also love a good B19. Favorite is the Stoeger X10.I just can't get over the ugly thumbhole design of the Diana 250.Maybe if I could get one in a Crosman Optimus stock, lol.
I think you guys may find that the Diana Two Fifty and the Diana 250 are 2 different guns.
According to Hector, the pivot joint WAS modified and improved on the Two-Fifty over the B19:"the barrel block to forks attachment was revised and two hollow pins with scalloped ends now make the attachment much more solid than in the original B-19."