The couplers, the grill, bellows, bellows clips, and the blue badge look very much like the same vintage as my old Paolo, though I have never seen openings behind the keyboard such as the ones on the backside of yours. But mine was a PA and did not have a tone chamber as this one appears to have. If it is genuine (which I certainly don’t have the ability to tell from these photos) it seems that someone put a bit of effort into removing the Paolo Soprani name from the celluloid yet replacing it using block lettering very nearly identical to the original font.