United States $1 Silver Certificate from 1957

This is a true, authentic "Silver Certificate" from 1957 when the United States was still backing our currency with precious metals.  I have them from Series 1957, 1957-A and 1957-B.  They are in circulated condition but have been in a protective sleeve for over forty years and are in great shape considering their age.  They came from an estate sale of someone who was obviously a collector.