Many of those coins were subject to President Roosevelt's Executive Order 6102 on April 5, 1933 that ordered all gold in the United Stated be turned in to the US Government. The Government paid $20.67/oz and then, after collecting all of the gold raised the price of gold to #35.00/oz, making a healthy profit of 8.2% for the Government. If there are any coins in that group from prior to 1933, and the owner/finder can not show proof that those coins were rom outside the United States at the time, they are subject to forfeiture.