Air Mail Letter: BELGRADE - STANLEYVILLE, BELGIAN CONGO 10.03.1939. Description: Air Mail Letter: BELGRADE - STANLEYVILLE, BELGIAN CONGO 10.03.1939. Correctly franked letter (Din. 4.00 foreign letter, Din. 12.00 air surcharge. Stanleyville arrival postmark on reverse. A very rare destination Air Mail Letter: BELGRADE - STANLEYVILLE, BELGIAN CONGO 10.03.1939. Auction: Aukcija br. 57 - Filatelija i razglednice Catalog No: 580 Category: Kingdom of Yugoslavia Quality: ✉ Current offer is at 120EUR. In order to place your bid your offer needs to be at least 130EUR or higher. Please place your bid: Other items from the category: Kingdom of Yugoslavia ✉ 608 16 EUR ✉ 609 16 EUR ✉ 610 16 EUR ✉ 611 16 EUR ✉ 612 16 EUR ✉ 613 25 EUR ✉ 614 25 EUR 615 85 EUR 616 40 EUR 617 90 EUR ←12345