The listing, Nat'l Wildlife Fed. Stamps has ended.
Set of 12 National Wildlife Federation stamps. Vertical oriented. 2.75" x 2" Part of 1 sheet, but they have been disconnected. Never used. They seem to be in good shape. I'm not a stamp expert! I've had these for about 30 years, but I don't know what year they were issued. Includes 1 each of: