From Ebay January 2018:
Very Rare Ch. MISSENHARTER Trombone. Medaille 1st Class Philadelphia London & Paris San Francisco American Institute Manf'r New York 8453 has 2 mouth pieces original MISSENHARTER and other in pic. I contacted a gentlemen that is trying to get as much info on Missenharters instruments and cataloging them for a history of them. He said he had never seen a trombone or had info on it. Case is leather and shows age and some damage.
