Friday Fur - Maggy Rouff, 1953

I've been puzzling over the construction of this white mink jacket? stole? for the last couple of hours.  Designed by Maggy Rouff in 1953, I think this is is a jacket with splits in the sleeves at the elbows so it looks like you're holding a separate muff.  But it could certainly be a separate muff.  What's your theory?