For your consideration here I have this lovely vintage KING 3B CONCERT SILVER SONIC trombone serial #414613, which I believe it was manufactured in 1965 by THE H.N WHITE CO. in CLEVELAND OHIO. This lovely trombone is a combo  which mean it has a valve section & hand slide as well. This trombone feature a STERLING BELL which is in great condition. Valve section is clean most of the lacquer is pretty much gone, pistons are tight great compression. Hand slide is outstanding work perfectly fine is very smooth and most of the lacquer has gone as well. Overall is a great trombone to own. This trombone comes in it original KING coffin hard case and a vintage mouth piece too. I only ship in the U.S and buyer pays shipping. THANKS & GOOD LUCK!!!!!