A wonderful model 5J tuba from C. G. Conn. The serial number is 343,XXX dates the instrument from 2016. This BBb tuba was made in the U.S.A., wears four piston valves, and has a bore size of .658inches. The bell diameter is 18inches. 
 
We sold this item new several years ago to a spirited elderly musician who, it seems, never played it. We would rate the condition a 9.9/10. The instrument did get a single tiny deng, but otherwise remains prestine. 
 
Suggested retail price after Sept. 2, 2021 is $12,247, street price new without case is typically around $8400, our instrument you can get for a significantly better deal AND it comes with a case!