16th Century French Cipher Machine(upload.wikimedia.org)

http://upload.wikimedia.org/wikipedia/commons/thumb/a/a2/16th_century_French_cypher_machine_in_the_shape_of_a_book_with_arms_of_Henri_II.jpg/800px-16th_century_French_cypher_machine_in_the_shape_of_a_book_with_arms_of_Henri_II.jpg