Pre-Regency Jumper, Countess du Barry 1789

Apparently I have a regency jumper obsession. There aren't that many examples, but I'm finding them really interesting. Here is an example of what sure looks like a jumper, though the painting dates pretty early (1789). It is a Le Brun painting of the Countess du Barry, and I'm sure it is meant to be all artistic and drapey rather than really fashionable or a record of good every-day wear. On the other hand, if you think about the timing, fashions really were getting kind of relaxed and drapey and artistic. So interpret it as you will, but I think it is rather pretty, and it is interesting to wonder how common jumpers were and when.