Mezue ahịrịokwu na-esonụ: A na-ebipụta stampụ pụrụ iche nke 1912<unk>13 Parcel Post stampụ maka
Panama<unk>Pacific Exposition nke e mere na San Francisco na 1915 site na ndị na-eme ka ndị na-ebipụta akwụkwọ maka usoro stampụ a. A na-akpọ ha "Die Proofs" ma na-ebipụta ozugbo site na anwụ na akwụkwọ na-acha odo odo na-acha odo odo. Mgbe nke ahụ gasịrị, ihe ndị a na-emebi emebi enweghị oghere gburugburu ha.