SPECIAL DELIVERY, REVENUE, AND AIR LETTER SHEET:

GUERNSEY, 1971
Air letter sheet for the Guernsey Scout Association with First Day cancellation.

PANAMA, 1964
Revenue postal tax stamp used both as a tax and, as a pair, as part payment of air mail postage of 12 centesimos to the USA.

CZECHOSLOVAKIA, 1918
Special Delivery.  Postal card used November 17, 1918 in Scout Post official delivery.
Pittermann category I (genuine and authentic).