Yeah i could be, the seller didnt have much info on the tuba and said
could be in eb or f , the only reason i think its in f the build reminds me of a B&S model 90 F tuba and the 2nd valve looks pretty short for an eb tuba , but truthfully in either f or eb i hope the horn plays well and is not in ...

Hello, I recently acquired this tuba, and I am wondering what the make of the horn its very old, most likely in F, and I want to see how hard it would be to add a 5th rotor to it I already have parts off an old Cerveny 681 and various other tubas, would it be worth:

1. replacing the lead pipe ...

Looking for a Conn 20j (2xj) lead pipe, willing to pick up or pay for shipping. Pm me if you have something.