 The first electrics (the ES1) had a steeplecab shape while later locomotives had a pentagonal shape.The electrics also feature a door in front of the locomotive with the exception of the 12E, similar to the Japanese JNR-era ones.Older locos have their doors at the center while newer ones starting with 14E feature a door at the left-hand side (right-hand from the observer's perspective) of the train.