Circa 1946 stampless airmail cover with oval 'Military Attaché British Embassy' handstamp on reverse and manuscript 'AIR COURIER VIA WASHINGTON' on front with circular 'BRITISH EMBASY SANTIAGO' Arms cachet and straight line 'ON HIS MAJESTY'S SERVICE' marking both in purple on front. Addressed to 'Regimental Paymaster, Queen's Regiment, Knightsbridge, London, S.W.1.'