1 Cent George Washington Stamps. Lot of 113 Washington 1 cent stamps that I inherited fom my grandparents collection. I have no idea about stamps. They have not been graded.  They are all attached to postcards with dates between 1907-19012 I believe. I am not a collector  nor do I understand the value of stamps. This is the biggest collection of one cent Washington's for sale on the internet. Some have that green line error that I see people talking about. 113 totl stamps.