Like most promos these were issued to advertise the new set, available mainly at hobby shops, usually distributed with the sell sheets for the sets. This is also an early use of serial numbering.
VERY slow trading due to health problems. Not transferrable so safe to trade with, just moving is painful and can't always access the cards.
Cardboard History My COMC
New Collection Website: Cardboard History Gallery (Still under construction)
Tips on how to make your scans look like the card does in hand (No more washed out, fuzzy scans!):