I have seen both the #3 and #3s Bianchi Pistol Pocket for the .45 Auto but they look virtually the same. Can someone explain the difference between the two please? Thank you

The #3 is the earliest model, I have one from 1977, the belt loop is sewn on, to the holster. The #3S (stands for "swivel") started being made in the 1980s, the belt loop swivels on a metal plate, locked in by a set screw. The allows the angle of the loop to be changed, from more of a forward tilt to straight up and down, so holster can be worn crossdraw, if desired

Thanks! Much appreciated.