2017 Sean Monahan 9999 Silver 1 oz 3-Coin Set Upper Deck – Cook Islands H818. This product data sheet is originally written in English. This listing is for. Upper Deck – Cook Islands. 9999 Fine Silver One Ounce Troy. As displayed in the photos. This listing is for: Upper Deck – Cook Islands 9999 Fine Silver One Ounce Troy NHL Hockey as displayed in the photos.