What is a silver certificate dollar bill?

Answer 1

Up to 1964 you could get a silver dollar for it

MoreSilver certificates were printed from the Civil War till the mid-1960s, although the last ones were dated 1957. Each dollar's worth of silver certificates in circulation had to be backed by an equal amount of silver on deposit with the Treasury. The price of silver was controlled by the government so it kept the currency's value stable but it also severely limited the government's ability to react to economic up- and down-turns.

By the early 1960s industrial demand for silver had skyrocketed and many governments, not just in the US, were forced to deregulate its price. Because its value was no longer fixed the Treasury had to stop redeeming silver certificates for silver coins. Starting in 1963, low-denomination silver certificates were phased out and replaced with the same Federal Reserve Notes that were issued for other, higher denominations.