Pin made in the Soviet Union. The text on the pin reads:”Yefremov”. Yefremov is a town and the administrative center of Yefremovsky District in Tula Oblast, Russia. Population: 42,350 (2010 Census). It was founded in 1637 as a fortress defending the southern borders of the Tsardom of Russia. It was granted town status in 1777.
Yefremov was occupied by the German Army briefly during World War II. The occupation lasted from November 23 to December 13, 1941. A Soviet Air Force facility, Yefremov air base, was constructed east of the town during the Cold War.