Over two thousand years ago, Julius Caesar invented an encryption device that bears his name—the Caesar Cipher. The standard algorithm Caesar employed was simple, yet it perplexed his enemies. In communication to his generals in the field, Caesar shifted each of the letters of his messages by a given number of places in the alphabet. Our pocket-size disk is a replica of the Caesar Cipher used by signalers in the army of the Confederacy. The Cipher comes with a soft velvet bag to keep it scratch-free.