The high quality class E 10.3 locomotives were improved and rebuilt a number of times over the course of their lives which also influenced the external looks of the locomotive considerably. The streamlined buffers were replaced by complete buffer beams and the characteristic bands of vents made way for new, more efficient vents. The original rain gutters were shortened and the grab irons on the ends were improved. The result was a locomotive that differed even at first glance from its original appearance, yet without abandoning its characteristic features. These timeless units are still in service today in commuter service.