Delben Lok Block: scarce!

One of the more scarce effects from Delben.  A tube is shown and two “glass” rods inserted into holes in the tube. A block is dropped into the tube. The rods obviously stop the block from going through.  The tube is then separated and the block if found to be impaled on the two rods in each direction!  A real stunner with some clever mechanics going on! Original instructions signed by Ben Stone.

Very good condition.  Tube is 11.5×2.75×2.75. The block is 2.25.