This National Wildlife Federation Collectors Stamp Books set includes all the years from 1977 to 1980, containing various stamps featuring Wild Animals in Multi-Color. The stamps are Mint Never Hinged/MNH and the set is complete. Each stamp booklet is in ungraded condition and is perfect for collectors who appreciate the beauty of the animal kingdom. The set is the perfect addition to any collection, and is a must-have for anyone interested in topical stamps. The stamps have not been certified, but are guaranteed to be authentic.