Hi David,

Thank you for contacting Mearto with your appraisal inquiry. I've found three other examples of this bill selling at auction; one for about $150, the other two for $300 and $350.
Based on the photos and information provided, and subject to examination, this is:

A 1779 Continental $55 Bill
Printed by Hall & Sellers
3-1/2 by 2-1/2 inches
CONDITION: ungraded, with some wear and edge losses commensurate to age and use.
PROVENANCE: inherited
$250-350*
*represents a fair-market value for auction purposes; retail or asking price may vary.

Please let us know if you have additional items to appraise, or questions/concerns, and thank you again for using Mearto.
~ Delia