15x 1957 $1 Blue Seal Silver Certificates Heavily Circulated

15x 1957 $1 Blue Seal Silver Certificates Heavily Circulated. Silver Certificates were redeemable in Silver. One of their most distinctive qualities is the blue Treasury seal and serial numbers. These notes include an additional legend printed on the face that is not present on any other Federal Reserve notes. The legend states that Silver had been deposited in the Treasury and was payable on demand to the note’s bearer.