I found "Just in Case" by JB Magic in one of my drawers. It is at least 20 years old, but still works perfectly.
It is the mini briefcase which is a miniature version of the suitcase where a bowling ball comes out.
The operation is more or less self-explanatory, but I no longer have a manual for it.
If anyone has it, you would do me a great favor with a copy or scan.
I can always send you a photo as proof of ownership.