1984 Delaware Migratory Waterfowl Stamp

Got this 1984 Delaware Migratory Waterfowl Stamp. It's the $5 one with the mallards on it. It says void after June 30, 1985 on the side. Pretty cool little piece of Delaware history if you're into collecting stamps or hunting memorabilia. It's still on the original backing paper too. Not perfect but looks decent for being almost 40 years old.