schematic for a pipe bomb, aka schematic for a pipe bomb
A list of detailed plans for wiring up a pipe bomb with an electronic detonator. 'FOR ENTERTAINMENT USE ONLY' is prominently printed on top.
It tells you how to make a pipe bomb with the following components:
1 - short steel pipe
2 - steel pipe caps
1 - bag of gunpowder
1 - detonator circuit
Making this would take good familiarity with craft.
In the upper right corner is a note: 'First discovered by Dr. Zaylin.'
It weighs about 100 grams. It is a electromechanical schematic. You think it might fetch about $2 on the market.