Naafi Postal Seal used on front of a postcard contrary to regulations

The Army stamps were for use only through military channels. The cover here has been posted into a normal civilian postbox, hence the postmark of Ismailia Camp. It therefore then received the 'O' marking showing that the stamp was invalid for use. Subsequently it then received the boxed [T] in Egypt and a postage due stamp in England for 4d, double the postage rate of 10 milliemes (equal to 2d).

The small 3 milliemes stamp was brought out for the concessionary rate for Christmas in October 1940. However free postage was implemented soon after, making its use redundant: only a few covers were posted early, making its genuine on cover quite rare.