in aphoto from 1963 .... i observe that the slide tuning tube is much longer.....

. some one in the past cut the tuning slide pair of tubes with a saw....... and is not cut strait.... is bad cut....SO i think tey try on the past to tuning on eb but they couldn
i am living in ITHACA GREECE

SO i got a sousa that is unbranded... trh problem is actually that i dont know what is the tone.... some one in the past cut the tuning slide pair of tubes ... one tuba man play the thing and tell me that THING tuned in D.... ITS kind of strange ... but i thin actualy isa CC but not a B\b SOUSA ...