On the left it says: “Day Of The City” and on the left it says: “Kryvyi Rih”. This pin is from 1988. Kryvyi Rih is a city in the Ukraine is located near iron ore and uranium industry.
The city was founded in the 17th. century by Cossacks. The name of the city means “Curved Horn” because of the shape of a nearby lake.
In WWII the city was occupied by the Wehrmacht and was severely damaged in battle. After the war they rebuilt the city.