I wasn't going to finish this tonight, but she called me and I had to!
The top half is Butterick 5209 (subtitled "Retro '47').
But the gathered skirt didn't appeal, so I frankensteined Butterick 4859 (fishtail skirt)
on the bottom. I lengthened the skirt a bit, and took out the 'side flip'.
It's not as formal lookin' in person as it is in this picture for some reason. It's also more fifties-shaped than the thirties-shape it looks on Jane, but that might be because I am more that way...