5c Orange P die (RN-P5), imprinted at center on back page taken from a Railroad Ticket Coupon Book, stamp printed on green paper, reverse in black with tooled diagonal squares, 54 x 85 mm., the book originally contained 100 coupons, each good for a single passage, extensive text printed over the stamp explaining terms and conditions, light corner crease not affecting the stamp, illustrated in Castenholz, extremely rare and believed to be unique, Castenholz $300.00 photo est.