I have a BAC apprentice Trombone. It is a couple of years old and has a brown carrying case. It is in excellent condition however it does have a few bumps and bruises on the bell. This does not detract any from the sound however it is something to be noted. This can be rectified by a talented brass musical instrument repairman. Otherwise it is set to rock and roll.
Here is the manufacturer and the same product line as the pictured trombone.
https://www.coolisbac.com/store/p/bac-sl-310
.500” Bore
8” Yellow Brass Hand-Spun Bell
Here is some info on the manufacturer and the quality of how their instruments are made. They have some really high quality work.
https://www.youtube.com/watch?v=XUv6gHx-eWo
https://www.youtube.com/shorts/XegtTD_yZhA
https://www.youtube.com/shorts/EQVeEc08M3A
https://www.youtube.com/shorts/jUfx_jJerIU
https://www.youtube.com/watch?v=eG4T0BEo8go