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