I rescued this Rudolph Wurlitzer from neighbors’ moving out garbage about 25 years ago. I use it at TubaChristmas and that’s about it. Made some amateur fixes just to kinda play the horn. In years past I’ve scoured the internet to no avail on how to pinpoint the age of this instrument. Finally I found this forum and hope there’s some guidance available. The engraving says “The Rudolph Wurlitzer Co Cincinnati O. U.S.A. PROFESSIONAL “. I believe the valves are engraved “1,2,3”. Beyond that I don’t know where else to look for any identification.