1965 AIR MAIL FIELD POST OFFICE (ADEN) TO USA WITH 2/6 CASTLE. Air mail envelope, slight soiling, 234 x 108 from Aden to California USA with 2/6 Castle, several short perforations tied neat 'FIELD POST OFFICE/255' date stamp 20 MR 65 - FPO 255 of Aden. (Ref 106148).
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