Auction # 2024 WORLDWIDE - ARGENTINA: Special June auction

Fantastic envelope printed on both sides with views and map of Brazil and varied indications (also of Graf Zeppelin arriving at Natal), sent by the Department of Propaganda from Rio to USA on 11/MAR/1937 by registered mail, franked with 1,800Rs., including the original letter with instructions to listen the radio program "The Brazilian Hour", very nice!