original Patent - Alessandro Bertinelli , Rom , Italien , 1894 , Streichklavier | Klavier , Piano , Orgel , Musik !!

Original Patent - Alessandro Bertinelli , Rom , Italien , 1894 ,  Streichklavier | Klavier , Piano , Orgel , Musik !! - Historical Documents
Original Patent - Alessandro Bertinelli , Rom , Italien , 1894 ,  Streichklavier | Klavier , Piano , Orgel , Musik !! - Historical Documents
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