Porto black numbers, block of 4, one is with inverted overprint. Description: Porto black numbers, block of 4, one is with inverted overprint. Described in HFS II on page 120/122. Porto black numbers, block of 4, one is with inverted overprint. Auction: Aukcija br. 48 - Filatelija i razglednice Catalog No: 220 Category: SHS Croatia Quality: **/* Current offer is at 60EUR. In order to place your bid your offer needs to be at least 65EUR or higher. Please place your bid: Other items from the category: SHS Croatia **/*/⦿ 228 35 EUR 229 30 EUR ←345678