China Computer by Edward Boettcher

This is a nice effect performing a version of the Cube Libra without covers or shells! You show three blocks with number on them. You turn them around and change the order. When you turn them back around the numbers are again in order. Very clever!  In Very good condition with a few nicks here and there (see photos). Many other effects possible.  Comes with German and English instructions. Blocks are 3.5 inches square. They are made of wood,