This is an Imperial bass trombone from the Nikkan musical instrument manufacturer (their top-of-the-line model at the time). The instrument is very old, and as a single bass trombone, it only has an F-rotor. However, it produces low notes well, and the large bell gives it a soft tone (in my personal opinion). One issue is that the slide lock is broken. The case is also a Keilwerth tenor bass trombone case, so the zipper doesn't close completely, and the case is also in poor condition. A mouthpiece is not included (it takes a large shank mouthpiece). As it is a very old instrument, there are scratches, rust, etc. Please examine the photos before purchasing. - Brand: Nikkan - Country of Manufacture: Japan - Trombone Configuration: Single bass trombone with F-attachment Thank you for looking.