This is a model 68 Holton trombone with F attachement (sometimes called the "Llewellyn"). It is a large bore with an 8-5/8" bell. It's a silver plated instrument formerly in the service of the US Armed Forces. It has a silver finish, with a matte finish on the bell exterior and a bright gold-wash silver plated inner bell. It's a large bore instrument with an F attachment. The condition is good, though the slide shows signs of having been repaired extensively in the past. It has not been serviced and is being sold AS-IS. Includes a corporation Vincent Bach 6 mouthpiece and a Gard gig bag.