From IMDb.com:
In 1976 an animated TV version of A Christmas Carol was made. It premiered as a TV special, but was thought to be so excellent that it was released theatrically and pronounced eligible for Oscar consideration.
Alastair Sim and Michael Hordern reprise their roles as Scrooge and Marley from the classic British film version of Scrooge (1951).
The only film version of "A Christmas Carol" to win an Oscar.
"The only film version of "A Christmas Carol" to win an Oscar."
That's interesting. I wonder if you can ever see it nowadays.