The "The Great Centaurian Puzzle" is puzzle trade card which dates from 1881  — as discerned from the calendar on the back of the card (see second photo) — thus making it 145 years old!  The card is in BEAUTIFUL condition; I would rate it as "museum quality."  The object is to cut the card (DON'T DO IT!) along the given lines into twelve pieces, and then form a square from the twelve.Â...