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:

1 - rusty metal spike
1 - electromagnetic motor

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.