To determine the value of 1 oz of fine silver one dollar coin you need to know the date. There is a coin which has a walking Liberty with the sun and rays at the side and the reverse has an eagle with open wings. It will also say one ounce fine silver one dollar, then you know its made of .999 pure silver. If it doesn't have the date or say one dollar then its a silver round and not a coin. The value also depends on the price of silver for that day.