This is a fiberglass case for Eb alto trombone made by MB Cases in Brazil. Its replaceable zippered cover can be had in any single or two-tone nylon or leather.
The exterior has attachments for included backpack straps and a removable sheet music pouch attached by zipper. The pouch has loops to attach a trombone stand, assuming you have a current external load permit.
The interior uses a secure new system for storing the hand slide. The crook end fits under a rounded brace and the upper end is secured with a strap. A soft padded divider closes over the slide, then the bell section goes on top. It's simple,. compact, and safe. This is used on the Bonna Baby trombone cases as well. The photos show that the bottom of the case is flat to safely fit the hand slide, while the bell flare rides higher in the top half of the case.
Some small storage area, modular foam padding and a mouthpiece pouch completes the inside. Though the case is designed for use as hand luggage, the tough shell and and soft cradling of the components makes this a terrific case for any alto trombone. The case appears plenty large enough for trombones with trill rotor or Bb attachment.
Longest hand slide from end bumper to bell connector