Cover ornamented with rubber stamp in purple, pink, and blue ink: heart design with sprocket edges, "HEMIPOST" (HEnning MIttendorg), and "MAIL ART MAKES MAN". Rubber stamp in blue ink: sender's return address. Paper slip with typewritten X's placed over envelope flap, torn by Bakhchanyan to open. A4 sheet enclosed. Poster for a mail art exhibition organised by Mittendorf. Includes list of participants in handwritten style. A4 sheet enclosed. Rubber stamps in red and green ink: "HAPPY NEW YEAR". Rubber stamp in green ink: seated man toasting with a glass surrounded by a ring of stars. Invitation to an exhibition of works by Mittendorf.