Combined Traction Brake Controller

An unusual photo!  Tube Troll informs me that the CTBC pictured here is a 1972TS 'handle', which have a straight shank rather than the more normal 'dipped' design normally fitted to the 73TS.
It is believed this was used as there was 'nil stock' of the correct part when this was fitted.  He also tells me that the unit in question has now had the correct part fitted.