Fleetwood National Audubon Society Don Balke Hummingbird Stamp Proof Cards

A vinyl hardcover portfolio of removable printed proof cards showing hummingbird paintings on cards and stamps. The book contains 6 bound acrylic sleeves with removable printed linen textured cards; they have debossing and gold foil and an attached stamp on each sheet. The back of each card contains a detailed description of each hummingbird, its region of origin, egg size and other natural history facts, and they read “Official Proofcard, National Audubon Society”, 1992 Fleetwood ®, Cheyenne, Wyoming, U.S.A. 56001. Paintings are by Don Balke. The stamps have an issue date of June 15, 1992. The book and cards are in very nice condition. The book is 6.5 in. x 9.5 in., each card is 6 in. x 9 in.