Pair of twisted interlocking metal nails each with a celluloid covered tin cap, one with portrait of the performer who has a chain wrapped around his arm which he prepares to snap by flexing his muscle. The second celluloid reads "Kronos/The Superman/Grand Opera House/St. Louis." The object is to separate the nails, a feat which can be done although we've not successfully done so in about a decade. Rare and NM displaying Mint.