Original Hallmark package of Superman Party Invitations. This is an unopened bag of 8 party invitations, with Hallmark header card. Cards feature a full figure of Superman holding his hands on his hips, and above him it reads “Its a bird, its a plane its a party!” Cards are mint , and come with the envelopes for mailing. They measure 3.25 inches by 5.25 inches. Originally priced at 49 cents, and were made sometime in the early 1970s.