Pyramid wood puzzle

Standard Range version made from December 1995 to January 2010.  1497 made.  All sold.
Original Price: AU$6.95

The object is to make the tetrahedron from just two pieces.

Tetrahedron: A four sided solid; in this case a triangular based pyramid.

E.T.Johnson patented a wooden version of this puzzle in 1940 and FUN Inc. Chicago produced a widely known plastic version of it in 1956. It’s in every Sciencecentre you’ve ever been to!! Is it too simple to have in your puzzle collection?
Size 80mm x 80mm x 66mm (each piece 80mm x 40mm x 40mm) Packaged DISASSEMBLED for your puzzling enjoyment