Bidspirit auction | Portugal airmail. Registered letter with

Portugal airmail. Registered letter with acknowledgment of receipt from the Lisbon North post office, sent on 14/12/1943 by airmail to Berlin where it was censored and returned to sender as the recipient had left and not left an address. Postage of 5$55 escudos corresponding to 1$75 international postage (table of 1.8.1934), 2$00 registration fee and 1$75 airmail fee (table of 1.7.1940).