Ottoman Bulgaria: 1865 (14 August). Folded complete registered entire to Istanbul franked with two 1pi and two 5pi of 1865 Dulos types for triple weight 6 piastres 69 route-hours and 6 piastres for registration rate struck by double circle blue ZAGRA 81 (now Stara Zagora – vilayet Rumeli-i Sarki, A&P type 4, R) handstamps. Rare.
