That's really pretty, Maggie. Here's a woman who has over 200 guides and reviews on perfume bottles etc. on ebay-she may be able to help: Click. She's got Blue Grass listed in 1934!

From what I am seeing, it's quite possible your bottle was by a well-known designer and will be the most valuable part as well as the original box. Someone wants $59.99 for an original bar of soap with box of the same fragrance!