@Setanta,
Upstairs Downstairs from 1971 - 75
I can remember watching it. It was black and white - not a colour TV.
As it is more than some time ago since I watched it I cannot really compare.
I had a feeling everybody was watching - there was not that much onTV in those days. It got to be a cult program.
The actors were very well known. The acting excellent, the story as much of a soap opera one could expect, but on a higher level.
Customs very beautiful in both series, little details historical correct
(which is not always the case)
The one takes place in London the other one in the country side, so it is as they go hand in hand.