There was an identical device at Eastleigh when it had a full island layout on the up side, until the late 70s or so, can't remember exactly.
Paul
Eastleigh was resignalled in the early 80s, when the semaphores in the Soton area were swept away. (Still remember hearing the bells as Central box rang "box closing" and within an hour the semaphores were being lifted out of place.)
So it was there in 80 and gone by 83, but I couldn't be more precise than that.