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 up end of a slide tube. There is a coil spring slide bumper and a small handle to hold the narrow slide. In high Bb, same as a Bb trumpet.
Includes a Getzen mouthpiece and SKB lightweight case. I may substitute a lighter Getzen case, will change the photos shortly.