schematics for a .357 speedload, aka schematics for a .357 speedload, 357, speed, and load

A yellowing bit of ancient paper. Diagrams and technical jargon flow down its length.

It tells you how to make a hand-loaded .357 speedload with the following components:

1 - loose rounds
1 - empty speedload

Making this would take decent familiarity with craft and decent familiarity with pistols.
In the upper right corner is a note: 'First discovered by Dr. Paco.'

It weighs about 100 grams. It is a ammunition schematic. You have no idea what it might be worth.