On the left, the more common CD 104 style, and on the right, the unusual PATENT DEC. 19, 1871 style. UPDATE: In October 2001, the CD 104 PATENT DEC. 19, 1871 style was assigned a new CD number, CD 124.1. Brett Burger has also posted a couple of nice pictures of this CD [id=28504921] and this [id=28504767;other view].