schematic for a magspike, aka schematic for a magspike, schematic for magspike, and magspike schematic
(No description set.)
It tells you how to make a magspike with the following components:
Making this would take good familiarity with craft.
In the upper right corner is a note: 'First discovered by Dr. Rade.'
It weighs about 100 grams. It is a electromechanical schematic. You think it might fetch about $2 on the market.