schematic for a police scanner, aka schematic for a police scanner and schematic for police scanner

A piece of paper with instructions on how to make your very own police scanner.

It tells you how to make a police scanner with the following components:

1 - broken battery pack
1 - keypad circuit
1 - small loudspeaker
1 - microprocessor
1 - quartz crystal

Making this would take some 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.

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