Here’s a pic from the 1947 film The Lone Wolf in London gratefully contributed by The Green Fairy:
2021 Link Updated to New Source.
The actress is Evelyn Ankers, and the fur is fox, and the gentleman in the background is giving it a rather stern look. Perhaps he’s wondering how such a nice fox turned up on film in 1947.
Turns out I don’t have The Lone Wolf in London, but I was confusing it with 1940’s The Lone Wolf Strikes, the followup to The Lone Wolf Spy Hunt, which features a very large white fox coat and a silver fox jacket. I do have that one and you may learn all about those furs soon…