
When I was a child, we hung paper streamers across the ceiling and bunches of balloons in the corners. The decorations looked like these (right) - they were made by a company called Harlequin and were intricately cut and bright colours. These gave way to similar "drop downs" where several metres of coloured foil cut out decorations were concertina'd between two end plates.
Our first artificial Christmas tree arrived around 1969, courtesy of Freeman's catalogue. It was very tall, right up to the ceiling, and turquoise with silvery bits.

Some of the baubles were those delightful old-fashioned ones with the side cut out. I've seen similar ones on eBay. We had a couple of glass birds. I loved them and was thrilled to find a very similar one at one of the Christmas shops in Oberammergau.

And at the top of the tree was a shabby fairy who resembled a ballet dancer. Her white crepe paper dress became a dirty yellow over the years.
One thing I've found is that there isn't much on the Internet about Christmas decorating traditions. I'll come back tomorrow with an update.