Vintage card, SHAMROCK fishing line Diamond Manufacturing Co. St. Louis MO., picturing a clover leaf, in n-mint unused new old stock condition. Couple of tiny edge/corner bumps. Size is 3 7/8" x 3 7/8". Scans show the front, back is blank. The black border is so all the edges can be seen and is not part of the card itself. NOTE: All of the advertising items I have listed are guaranteed to be 100% authentic originals. They are all clean and ready for display. Thank you for your purchase I appreciate it.