Sandy G's mention of old phone switchgear reminded me of this.
It's a 25 line pabx with tube tone generators, probably from the mid 60s.
It was found installed in a tiny old house on the site of the Rocla pipe factory in the Springvale. That little house held the offices before the larger building was built in the 70s. It was abandoned until around 2001 after production was stopped in the mid 80s and the research lab closed sometime in the early 90s. It is now a housing estate, but the 70s office building remains and was still occupied when I was last in the area. Most of the production machinery was from the 60s or earlier and most of the control gear was still tube based in some way (well, thyratrons, analog computers and nixie tube displays anyway).
