Olympic pin

I recently purchased a lot of pins in an auction, the one I am searching for more information is pictured above. The lot contained some Russian Soccer Club from Dynamo Kiev from 1956 and 1957 so I am presuming this is also from Russia in the 1950's but I am not 100% certain of that. The pin has what appears to be an olympic discus thrower with the olympic flame in the middle of the pin and a 3-color flag at the top. The bottom of the pin contains the letters UCFS. Anyone help me ID this or point me in the direction to find out more about it.