Not that long, I think it replaced the mahogany Audrey at the beginning of the year. I had to order the walnut through the FP store, as it wasn't in the stores in the beginning of December. Some of the department stores had it earlier though.
Word of warning, the one I got stinks like shellac or something. So give it a good sniff test before buying. I'm afraid I'll be returning/exchanging mine as I've had it airing and it hasn't helped much. I had the same problem with a Sabrina that I wound up returning also.
So irritating! I don't want to smell shellac I want to smell leather!