Portugal. (German Occupation of Serbia). 1943. Portuguese Air Mail postal stationery card $1 red upgraded with SG 839, 15c black and SG 846, 80c emerald (2) tied by Lisboa double ring addressed to Belgrad, endorsed 'via Berlin' with German censor cachet in red and circular '17' hand-stamp in blue with framed '3227' in carmine and bearing German Occupation of Serbia Postage Due SG GD19, 3d scarlet tied on arrival.
Nice item of uprated Portugal postal stationery sent to German Occupied Yugoslavia. Serbia was occupied from 17th April 1941to 13 November 1944. Deficiency equivalent to 1. 5 din postage due issued '24th June 1941'. A rare occupation stamp on card or cover.
Ex Kiddle.