Small size silver certificates were issued from 1928 to 1964, in denominations of 1, 5, and 10. Silver Certificates also known as Blue Seals and Blue Seal Notes are still legal tender but since 1968 they have been redeemable only in Federal Reserve Notes and may no longer be exchanged for silver. The 10 dollar silver certificate is housed in a protective 5 x 8 inch vinyl portfolio. The 10 dollar bill features Alexander Hamilton on the front and the US Treasury on the back. A Certificate of Authenticity is included.