Introduced in 1912. Discontinued in 1917. Another very rare back design–decks or even singles are almost never seen. Oddly, all I have is an empty blue box. I bought it paired with a different back design in the hope that I might someday find a blue Margin Tri-Plaid deck in need of a home. In any event, boxes for even moderately uncommon designs are more difficult to find than decks, so having a few rare boxes kicking around is never a bad idea.