A good original WWII Soviet Combat Service Medal here, with the somewhat early serial number of 562,995. Original and correct brass mount. This medal has not been researched but has research potential. Condition is visible in photos. Enamel in the "CCCP" of this medal is lost to time, a common issue with these awards.
 
The Combat Service Medal was a Soviet military medal awarded for "combat action resulting in a military success", "courageous defense of the state borders", or "successful military and political training and preparation".