Gift Shop Postcards Description NMM 10230.  Diatonic harmonica by Andreas Koch, Trossingen, Germany, ca. 1925. Sirena model. Alan G. Bates Collection, 2003. Size:  4" x 6" Included in Set of 51, 4 x 6 Color Postcards (Order 70):  $19.95 Single copies (Order #9.49):  $.50 each Return to 4 x 6 Postcards Return to Postcards Return to Gift Shop National Music Museum The University of South Dakota 414 East Clark Street Vermillion, SD 57069 ©National Music Museum, 2004-2007 Most recent update: October 19, 2007 You are the 1,916th visitor to this page since October 8, 2004. The University of South Dakota Return to Top of Page