The medallions are a souvenir from Khatyn memorial in Minsk Belarus. Each medallion is 2 11/16", and I think they are made of brass plated cast aluminum? because they are light in weight, but I am not a 100 percent sure. The photo with the three trees says 2 million 230 thousand killed killed every 4 during the war, the one in the photo of the man holding a dead body says "The world in centuries has not seen these suffering on our land", the one to the right of that one says "built by Nazis 260 death camps". was not able to get anymore translations from the others.I am not sure if this is accurate but it is all I had to go on. Minor age and usage wear spots, and the plastic storage case has a cracks along with scratches, and scuffs.
See photo's