On Thu, 15 Feb 2018 11:08:40 -0600, Mark Lloyd
wrote:

I often hear older people in the US say 110/220.

It would be interesting to know what the actual voltage was in the
50s. Decent meters were far beyond what a regular homeowner could
afford.
I know the nominal voltage we talked about creeped up throughout my
life. 110 became 115, 117 and then 120. I also hear 125 from time to
time. My panel normally cruises around 123-124. If I don't buy 130
volt bulbs, they don't last long. Fortunately they are not regulated.