This is a nice set of 6 sequential $1 Silver Certificates.  I'm not a collector but came across these in my deceased banker father's personal effects.  

1957 series, last 4 serial numbers run 9395 - 9400. Sold only as this lot of 6 (not sold as individual banknotes).

These are uncertified, but using PMG's grading system I would say they are Very Fine or Extremely Fine. They appear to be lightly circulated. All have two horizontal folds and some a few pin holes. Please look carefully at the photographs before bidding/purchasing.