What is the value of a 1957 1 dollar silver certificate with Smith-Dillon signature?

The signatures belong to Treasurer Elizabeth R. Smith and Secretary C. Douglas Dillon (note - not "Dillion", but it's hard to make out)

These notes remain common among collectors and are only worth $1.25 to $1.50 if circulated. A crisp, unfolded specimen might retail for $3.