Pin made in the Soviet Union. The text on the pin reads:”Ryazan”. Ryazan is the largest city and administrative center of Ryazan Oblast, Russia. The city is located on the banks of the Oka River in Central Russia, 196 kilometers (122 mi) southeast of Moscow. Ryazan is among the oldest cities of Russia. As of the 2010 Census, Ryazan had a population of 524,927 making it the 33rd most populated city in Russia, and the 4th most populated in Central Russia after Moscow, Voronezh, and Yaroslavl.
During World War II, Ryazan was repeatedly bombed by German Luftwaffe. Immediately after the war, rapid development of the city began, and it became a major industrial, scientific, and military center of the European part of Russia. On October 19, 1960 a petroleum refinery produced its first gasoline.