10 roubles 2006 SPMD Chita region 

Chita Oblast (Russian: Читинская область) was a federal subject of Russia (an oblast) in southeast Siberia, Russia. Its administrative center was the city of Chita. It had extensive international borders with China (998 km) and Mongolia (868 km) and internal borders with Irkutsk and Amur Oblasts, as well as with the Buryat and the Sakha Republics. Its area was 431,500 square kilometers (166,600 sq mi). Population: 1,155,346 (2002 Census) . The oblast was established on September 26, 1937. On March 1, 2008, Chita Oblast merged with Agin-Buryat Autonomous Okrug to form Zabaykalsky Krai.