1957 ADVERTISING AIR MAIL RHONDA (GLAMS) TO ILLINOIS USA. Envelope, 104 x 241 sent air mail from Treorchy, Glamorgan to Illinois USA with QEII 1/3d meter mark dated 20 X 57, advertising 'RAY O VAC' leak-proof batteries with fine coloured illustration of product at lower left. (Ref 60644).
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