I discovered a tape labelled 'Christmas Carols 24th Dec 1983' in a cupboard at 53 over the summer.
Just before I threw it out, I recorded it onto MP3.
For your aural enjoyment - vintage stuff:
In reality, there were several versions of these carols. The collection above is the best of each carol (if you can believe that!).
The discarded ones contain some duff trumptet entries, the odd clarinet fart, an unbearable amount out-of-tune cello notes and some unwanted piano plinking.