Bidspirit auction | Angola. Airmail. Letter sent from

Angola. Airmail. Letter sent from Sá da Bandeira, registered and by airmail to Luanda, where it arrived on December 18, 1945. Postage and registration cost 1$00 ($50 + R$50) (two stamps of $50/1.75 Ang) and a 0.50 Ang Assistance stamp, mandatory from December 8 to 31 of each year. An airmail surcharge of 1.80 angolares was also paid.