South Hampstead, looking eastwards towards Euston. Pre-1965. (CWJ @ 2m 33ch). The signal belongs to Camden No.2 box and refers to the Up Slow line, from which branch the double line to Chalk Farm, Camden Road and the North London Line, after Primrose Hill Tunnel. (Ref: 031668)
The platform on the left is the up DC lines platform; the down is hidden although the disused up slow face can be seen. The right hand lines are the WCML slow lines, and the fast lines to the right of them cannot be seen. In the distance, before the western portal of Primrose Hill tunnel can be seen the overbridge carrying the GC line from Marylebone (to the right) to points north (to the left).