Kammala wannan jumla: An buga takaddama na musamman na 1912 <unk> 13 Parcel Post stamps don
Panama<unk>Pacific Exposition da aka gudanar a San Francisco a 1915 daga matattun da suka yi faranti na bugawa don wannan jerin hatimin. Ana kiran su "Die Proofs" kuma ana buga su kai tsaye daga mutu a kan takarda mai laushi mai launin rawaya ɗaya a lokaci ɗaya. Bayan haka, hujjojin mutu ba su da rami a kusa da su.