The phrase "knock on wood" is believed to have come from an 18th-century children's game in which touching a piece of wood would protect you from being tagged. The notion traveled into the following century, and during the first World War, British troops would carry these tiny wooden charms into battle, hoping the material would protect them, as it did during their childhood, from getting tagged. (Forever.) This WWI era lucky silver charm is modeled on "The Optimist" pictured beside it. It's wooden head is detailed with a four leaf clover, the silver body is emblazoned with "Fumsup", both hands with thumbs up, and little silver wings at its feet.