Letter sent from Mrkonjić Grad by airplane to Guinea Description: Letter sent from Mrkonjić Grad by airplane to Guinea in Africa 15.05. 1961. Arrival on the reverse. Letter sent from Mrkonjić Grad by airplane to Guinea Auction: Aukcija br. 48 - Filatelija i razglednice Catalog No: 989 Category: Yugoslavia Quality: ✉ Current offer is at 14EUR. In order to place your bid your offer needs to be at least 14EUR or higher. Please place your bid: Other items from the category: Yugoslavia 1018 28 EUR 1019 12 EUR ** 1020 600 EUR ←123