It's shown below in a picture from an issue of Simplicity Fashion News, circa 1974:
She looks like she could be waiting at the train station in 1940 - ready for an Agatha Christie film on PBS or something.
Here is the same dress on the front of the pattern:
I'd love to see it in a nice wool with a Christmas fabric on the contrasting collar and French cuffs.
The version she is wearing in the top photo would be a very happy Christmas dress as it is, in fact.
But I truly believe that hat is what makes the outfit!
(Oh - and if anyone knows the name of the model, please let me know and I will add it here. I think it might be Sunny Redmond, but I'm not sure this time. )