3 epochs... EP2K/ChS2T\ChS7.
EP2K on the left is a main-line 6-axle DC electric locomotive made by Kolomna Locomotive Works (Russia) from 2008, It is intended for hauling passenger trains on electrified routes (3 kV) of Russian railways with gauge width 1520 mm.
ChS2T in the center is an electric mainline DC passenger locomotive, made by "Skoda" in Czechoslovakia (Czech Republic) specially for Soviet Union railways. Between 1972 and 1976 were built 119 locomotives used mainly at the line between Saint-Petersburg and Moscow. ChS7 is an electric mainline DC passenger locomotive. Both locomotives made in Czechoslovakia at the V.I. Lenin (Skoda) plant in the city of Plzen, Czech Republic specially for the railways of Soviet Union. Build date: 1983-1999.