This book covers all 48 known over mintmarks in all series of U.S. coins. Includes those punched over horizontal and inverted mintmarks, as well as misplaced mintmarks. Kevin Flynn & John Wexler. ISBN: 0967965535. Pub Date: 1/1/2003. Edition: 1st. Binding: Paperback. Size: 8.5x11. Pages: 183. Case: 30 .