Veliko Tarnovo-Tırnova: 1877 Folded letter from Veliko Tarnovo to Constantinople bearing on reverse Duloz 1876 1 piastre orange- yellow and 1875 20 para green tied by fine strikes of Arabic double-circle “Tirnovo 81” handstamp in black (Coles & Walker fig. 78) with bilingual Stamboul arrival postmark alongside