Please note: This is a kit only. It includes the body, bogie sideframes, battery box (Because electric locos don't have diesel fuel tanks ;-)), detail parts (Vacuum hoses, horns), couplers and screws. It does not include a mechanism or pantographs. The modeller will need to source a Roco E10/BR110/BR112 locomotive as a donor for the mechanism and pantographs. The older style mechanism is required.
Part way through the construction of the 5E1 Series 5, the body design was changed. The rounded corners between the cab face and locomotive body were replaced with squared edges. The headlight size was also reduced. Other than these changes, the external features stayed the same as the rounded series 5 and the series 4
The spotting eras as modelled can be loosely defined as Early, Mid and Late.
The differences between early and mid, and mid and late are based around three modifications. As delivered (early), the locomotive pilots (NOT cow-catchers!) had four long vertical slots each side of coupler.
The division between early and mid is based on the deletion of the left most long slot on the pilot leaving four slots on the right hand side and three on the left. Studying the extensive collection of photos on hand, this appears to have occurred some time in the mid to late 1960s, over the period of a few years.
The division between mid and late is based on the deletion of the right most long slot on the pilot, leaving 3 slots on each side of the coupler. In addition, at around the same time, the MU sockets on the right hand side of the cab were replaced with captive cables and dummy receptacles for the plugs on the ends of the cables. These modifications did not necessarily happen at the same time, but were within a year or two of each other. These mods occurred in the early to mid 1980s. It was also around this time that the Series 4 and rounded Series 5 received the twin sealed beam headlight conversion
The modification applied where a plate was welded over the slots from the inside of the pilots is not taken into consideration, as this modification seems to have been somewhat haphazardly applied over the years.