Weatherboard - Capital Adventures — LiveJournal
I think the square metal box is the remains of a light fitting. It's at Plimmerton railway station which dates from 1940 according to Wikipedia, but it's the second (at least) installation, looking at the holes next to it.
What's the lower limit on the age of that sort of wiring, do you know?
Edited at 2010-05-16 10:31 am (UTC)
It's still in use. Standard house wiring, that is.