Just stumbled upon this thread. The top one is a class of 1915 graduation jeton of the 2nd Cadet Corps in St.Petersbourg, the other one - 100-year anniversary of the Russian Railway Ministery, Robert Werlich's identification of that one is not correct. Both are so called jetons, worn on the uniform button, suspended from a chain, unlike screw back badges, so naturally they can't be found in Patrikeev's badges catalog.