Radiator Shell ID Help

[05snopro440]

I'm trying to ID this rad shell that I've had as wall art for several years. It's larger than a Model A, so it would have been a full-sized vehicle of some sort. It's not Ford, Chevy, Buick, etc.

 

[05snopro440]

On another car page someone came up with the possibility of a 1929 Marmon Roosevelt. I need to have a look to compare, but that seems like it.

1929 Marmon Roosevelt