10 roubles 2007 SPMD Rostov region, from circulation

 Rostov Oblast (Russian: Ростовская область) is a federal subject of Russia (an oblast), located in the Southern Federal District. Rostov Oblast has an area of 100,800 square kilometers (38,900 sq mi) and a population of 4,277,976 (2010 Census),making it the sixth most populous federal subject in Russia. Its administrative center is the city of Rostov-on-Don, which also became the administrative center of the Southern Federal District in 2002.