This is a vintage professional King 3B Concert F-Attachment trombone with a vintage hard case included. This particular horn (serial number 310050) is from the 1950s. With a .508" bore and an 8" bell, it has a warm tone and plays very well. 
 
This is the standard for jazz trombones. 
 
There is cosmetic wear and tear, but it has been serviced by our technicians and it plays great. 
 
 
NOTE: This trombone is only available for local pickup. No delivery.