I picked this up on eBay on a chance that it would be as described given that the picture was dark and dingy. It arrived, and I looked and the helix was perfect, the badge magnificent, and the handle in lovely shape–only missing the brush.
But, the piece was heavily tarnished with black spots all over it…so, I used a little polish to remove the gunk, while trying not to give it too much of a shine. And, there it was… a working Thomason corkscrew with "Ne Plus Ultra" badge!!!!!!