This is a vintage navigational map / chart - # 851 and #852.   It is a double sided chart.  The # 851 is Matecumbe to Grassy Key, Florida.  4th Edition - April 4th, 1970.  The  # 852, on the back side is Grassy Key to Bahia Honda Key - Same edition and date.  Both sides are in very good condition.    Shipping is $7.50 if within the USA.  Check out my other items.    I have quite a few different navigational charts listed.   I have quite an eclectic mix of interesting items listed, and am always adding more.  Please add me to your favorites list.