During construction of the first stage of electrification VR took many photos of the new works. Here we see the newly erected stauntions and wiring at Brighton Beach, prior to conversion to 3 position signals, note the signalbox on the right. circa 1919. Note the notch in the disc signal, it appears that this disc turned toward the post rather than the normal situation where the disc would turn away from the post, no doubt done for clearence reasons.
Official VR photo.