Created by Lubor Fiedler. A pen is inserted into and passed through a case, and can be seen protruding out of both ends. When the case is opened, however, the only thing that can be seen is a spring running down the center, there is absolutely no sign of the center portion of the pen. Pulling the pen out with the case still open brings it back into full view.

Includes illustrated instructions. In original packaging. Condition very good.