Airmail Postage Stamps With City And Dates, Vector Icons. Post Office Delivery And Customs Approval Stamps Of London In Britain, Seattle And New York In USA, Paris France And Geneva In Switzerland
Airmail etiquette - Wikipedia
Air mail stamp PSD - PSDstamps
6 CENT US RED AIRMAIL POSTAGE STAMP, TRANSPORTION ISSUE, DUAL PROP, 1941, C25 | eBay