King 3b Concert trombone
The 3b Concert trombone was so well liked that it is still in production. RRP on a new one is nearly £3000 but you can get one for about £2250.
Serial 668xxx suggests a late 1970s manufacturing date.
Ours comes in a sturdy case with mouthpiece.
PRICE: £700 ono
Comes with case and mouthpiece.