This is an unusual instrument sold long ago by Getzen and DEG as an inexpensive slide trumpet. Most of the parts are formed to simply fit over the adjacent part without additional ferrules. The slide lock hooks onto a slightly bent-upward end of a slide tube. There is a coil spring slide bumper and a small handle to hold the narrow slide. Pitched in treble Bb, same as a Bb trumpet.
Includes a Getzen mouthpiece and SKB lightweight case. The case will hold a Bb piston trumpet instead of the slide trumpet if you like. This instrument is in fine condition and will ship with a freshly polished hand slide.
Is it playable? Well...not sober, no.