Keywords: Definitive stamp & Parcel Post size comparison.jpg en Image of two US Stamps in size comparison Two stamps 1910 and 1912 U S Post Office; Smithsonian National Postal Museum Bureau of Engraving and Printing; Composite photo and imaging by Gwillhickers PD-USGov Uploaded with UploadWizard Stamps of the United States 1911-1920 |