Trastaverre neighborhood Rome is where that Guzzi sidecar rig spotted and you were correct it did come from Catania Sicily originally the tag has CT .
Trastevere, that's fancy! The imagination runs wild now - - - -
Maybe the rig belongs to a high-ranking mafioso. That sidecar must come in handy
Or, there's a man from Catania who hasn't been able to sell his beloved old Guzzi after moving to Rome, because of all the fond memories involved - straight out of Cinema Paradiso.
Any better suggestions?