schematics for slug shotgun shells, aka schematics for slug shotgun shells, slug, shotgun, and shells
A yellowing bit of ancient paper. Diagrams and technical jargon flow down its length.
It tells you how to make a batch of slug shells with the following components:
Making this would take good familiarity with craft and decent familiarity with rifles.
In the upper right corner is a note: 'First discovered by Dr. Mservo.'
It weighs about 100 grams. It is a ammunition schematic. You think it might fetch about $2 on the market.