ROCKET MAIL Souvenir SheetThe very thin souvenir sheet, commemorating the Silver Jubilee - flown in the "ZODIAK" rocket.Rocket flight was conducted by Alan H Young and the Queensland Air Mail Society.EZ 4C3 - blue sheet - approximately 8" x 10 1/4".The right side of the sheet is missing part of the sheet creases from folding and will be folded for mailing.