It tells you how to make a landmine with the following components:
1 - firing pin assembly
1 - piezoelectric ignition circuit
1 - pipe bomb
1 - relay
1 - broken battery pack
Making this would take some familiarity with craft.
In the upper right corner is a note: 'First discovered by Dr. Nous.
It weighs about 100 grams. It is a electromechanical schematic. You have no idea what it might be worth.