According to this topic it's described as a "the box of numbers" (but mind you it may be called something else).
A Google finds that the idea is that a person puts the numbered blocks in any order, and the magician can then (by magic) tell the person what order they are in.
On the allmagic.com website you can ask their 'Mr.Magic' about all manner of magical topics and they usually have regular pieces on antique magic apparatus. The link is http://allmagic.com/magicshow/askmrmagi ... cgi?newmrm . Best of luck and please let us know the answer when you find out!