Conn New Wonder Double Bell Wonderphone Euphonium
Date: 1907. Owned by Michael Keller
This is a jeweled, silver plated with gold wash bell, "New Wonder Double Bell Wonderphone Euphonium". It was reputedly made for Simone Mantia when he was soloist with Arthur Pryor's band. It has a specially made fifth valve lock. The fifth valve was used to switch between the normal bell and the secondary bell.