The keys aren't very Hohner in design (black keys are thicker, ends of keys are rounded, etc.), the curve in the keyboard is symmetrical while Hohner swept keyboards tend to be off centre, the bellows pins are definitely not Hohner (all the early Hohners I've seen use pins with a small round head and a washer), and the decoration appears to be inlaid, which is common on old Italian boxes, while Hohner decoration tends to be printed onto the celluloid. The Carlo Rossi is 99.99% definitely not a Hohner!