From Stamps of the World
Oradea (German: Grosswardein, Hungarian: Nagyvárad) is the capital city (196,367 inhabitants in 2011) of Bihor County and Crișana region. Until 1918, GROSSWARDEIN - NAGY VARAD was part of the Austrian monarchy, Hungary province, in the Kingdom of Hungary (Transleithania) after the compromise of 1867.
Kingdom of Hungary period (1867-1918)
Austrian Empire period (until 1867)
The post-office opened before 1850.