I see the pics now. That looks pretty close motomech. I searched early Caddys and that 1927 was the only one I saw that was close too. It could be an optical illusion but the edges of the Caddy grills I found appear to be more rounded than herself's. I couldn't find a good close-up of the radiator cap area. Maybe I'll research some more later. Here's another 27 Cadillac grill pic. It sure looks similar to what she has.
heres a 26 ajax the little crest is a little less pointy under the badge but it is also close most of the ajax cars if looked at online also had the hole in the bottom of the grill for a hand crank starter