Images from The Alan G. Bates Harmonica Collection Rare Gretsch Double-Sided Chromatic Harmonica NMM 9018.  Chromatic harmonica by Gretsch, Germany, after 1930. This double-sided chromatic harmonica in C and G was a short-lived experiment. Most chromatic players became adept enough to play in any key on a C-tuned instrument, so a second key was unnecessary. After 10 years of searching for another example, Alan Bates concluded that this is the only double-sided chromatic harmonica known to exist.  Alan G. Bates Collection, 2000.   Click arrow to continue Bates Virtual Gallery Tour Go to Bates Virtual Gallery Tour 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 11,049th visitor to this page since January 21, 2002. College of Fine Arts The University of South Dakota Return to Top of Page