Mazzeo System Clarinet in A by Henri Selmer, Paris, 1961 NMM 5832. Clarinet in A by Henri Selmer, Paris, 1961.  Rosario Mazzeo Collection, 1995. Twenty German-silver keys, five German-silver rings, one German-silver plateau key. Modified Mazzeo system with custom modifications designed by Mazzeo ca. 1968. Modifications include: elongated left hand g-sharp' key; German-silver plate attached to left hand thumb plateau key; c-sharp'/g-sharp'' key extension that is operated with right hand; left hand "Bis" key. Rosario Mazzeo's U.S. patent #2,867,146 (1959). 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 3,866th visitor to this page since May 14, 2002. College of Fine Arts The University of South Dakota Return to Top of Page