The first signal box here is not the one shown on bowroaduk's collection of photo's but is alongside it, although not complete. The top has been removed but the locking room remains, and matches the style of the cabin from the same date at Campbell Road junction. The close up photo shows the original brickwork and the later alterations including blocking the lower windows.
Bow Road was a semi-regular reversing point for some off-peak District trains right up to October 1960, when they were abolished in favour of a more frequent service east thereof (i.e. after the District tracks were segregated from the main line). The cabin closed 10/10/60, the catch points just east of the station were removed 19/3/61 and the track plain lined and on 23/2/64 the area was converted to automatic signalling. Trains reversed east to west east of the station on the steep bank - bet that wouldn't be allowed today!!
The service prior to October 1960 saw the east-end off-peak service comprise 3 trains per hour to Upminster, 3 to Dagenham East and 2 to Bow Road.
The new timetable (October 1960) saw off-peak Monday to Friday service to Dagenham East increased from 6 tph to 8 tph, and from 3 tph to 4 tph Dagenham to Upminster.
As an aside, there were Bow Road reversers right from the opening of the line from 1/6/1902.
That is not the old signal cabin it is actually in the second picture where the brickwork is white on the lower half on the platform ramp. The room in picture one is very small and only houses the train describer equipment. When you enter which is now the relay room you can tell this was a cabin just in the layout and you can tell where a frame would of been due to the fact there is a concrete block for someone to stand on to operate the area.
That is not the old signal cabin it is actually in the second picture where the brickwork is white on the lower half on the platform ramp.
It is you know (but the older signal cabin) - the 'topless' building is the old Whitechapel and Bow Railway electromechanical signal cabin that opened on 11/06/1902 - you're thinking of the LPTB power installation that opened on 20/10/1946 and demised as charted by reg. upthread
If we can have A 244/R 246A, ODX 246A/R 246B, A 246B/ROD 1, OD 1/ROD 2 then I'm going to have A (7)88/R (7)90A, NHX (7)90A/R (7)90B, A (7)90B/RNH 1, NH 1/RNH 2 and hang the consequences!