I'm pretty sure it's a Luxury Liner rack, although I don't know what year the braces would have extended sideways, and I can't seem to find a picture of a rack exactly like yours
OK, I found the same style rack on a 1953 Luxury Liner on Dave's site, and on a 1950 on the Copake Auction site.
I don't THINK the braces were as extreme after 1953, as I'm not an expert.