Unfinished Experimental Prototype Mazzeo System Clarinet in B-flat, ca. 1955 NMM 6116. Clarinet in B-flat, unfinished experimental prototype, ca. 1955.  Rosario Mazzeo Collection, 1998. One piece body only. Tone holes not drilled through. Five keys, four rings, one left-hand plateau key, twelve pad-covered tone holes, extra large right-hand thumb rest. National Music Museum The University of South Dakota 414 East Clark Street Vermillion, SD   57069 ©National Music Museum, 2002, 2003 Most recent update:   May 6, 2003 You are the 3,507th visitor to this page since May 14, 2002. College of Fine Arts The University of South Dakota Return to Top of Page