Lot of Vintage 1977 Star Wars OPC Trading Cards - Portraits Only - NM-MINT

This is something that I picked up from a garage sale! I dont know much about it but its a pretty unique item! I dont know which cards are which and have already packaged them so please only purchase if you are happy to receive the cards shown in the phots :-) Conditions are overall great for their age but some cards may have some issues, but overall for the age are great; Thanks!