Plovdiv-Filibe: 1855 Registered entire letter from Plovdiv to Sofia showing very fine Arabic negative “An Canib Posta-i Filibe 256” (on behalf of Plovdiv Post Office 1840) handstamp in brownish black (Coles & Walker fig. 16) with Arabic small negative “Taahhüt olunmuştur” (has been registered) seal alongside, weight 3 Dirhem / postal charge 1 piastres 20 paras in manuscript at top left side