1957 A Series Silver Certificate

I received this as change from a store purchase.

Silver Certificates are a type of representative money printed from 1878 to 1964 in the United States as part of its circulation of paper currency.[1] They were produced in response to silver agitation by citizens who were angered by the Fourth Coinage Act, which had effectively placed the United States on a gold standard. The certificates were initially redeemable in the same face value of silver dollar coins, and later in raw silver bullion. Since 1968 they have been redeemable only in Federal Reserve Notes and are thus obsolete, but are still valid legal tender.
The seal and serial numbers on many of the first Silver Certificates issued were red, brown, and blue. It was not until Series 1899 for the $1, $2, and $5 denominations that the seal and number colors were officially and permanently changed to blue. (This occurred at different points for denominations above $5). During World War II the government issued 1935a Silver Certificates with a brown seal for Hawaii distribution and 1935a certificates with a yellow seal for North Africa distribution. The idea was that if these areas fell into enemy hands during the war, the money could easily be identified and cancelled so as to prevent large monetary losses.