Images from The Alan G. Bates Harmonica Collection "Trumpet Organ" Harmonica by Andreas Koch, ca. 1920 NMM 8687. "Trumpet Organ" harmonica by Andreas Koch, Trossingen, Germany, ca. 1920. In this version of Koch's popular "Trumpet Organ," the harmonica and its five non-functional horns are mounted in a cylinder with capped ends. Alan G. Bates Collection, 2000.   Click arrow to continue Bates Virtual Gallery Tour Go to Bates Virtual Gallery Index Go to Virtual Tour Index Go to description of The Alan G. Bates Harmonica Collection National Music Museum The University of South Dakota 414 East Clark Street Vermillion, SD   57069 ©National Music Museum, 2002, 2003 Most recent update:   May 5, 2003 You are the 13,440th visitor to this page since August 2, 2002. College of Fine Arts The University of South Dakota Return to Top of Page