Nothing fancy I think, run of the mill 1957 silver cert, but it's in great shape and fun when a bank teller saves stuff like this for me. I'm not well versed on currency so if I'm missing anything please chime in
Great save !!
Priest/Anderson signed two one dollar bills; the Series of 1935F (~1.B printed) and (stangely) 'your' Series of 1957 bill (~3B printed).
To find a bill in such good shape suggests someone was taking good care of it for decades.
Don........