1976 $100 Cook Islands Proof Gold Coin. Coin is 9.6 grams of 900/1000 fine gold. Contains .2778 of an ounce of 24kt gold. Comes in nice binder and coin is in a COA holder. Also includes a copy of a letter written by Benjamin Franklin informing all American Naval officers to allow Captain Cook's ship safe passage back to Europe. Please enlarge the pictures.