Reference to an earlier post from 3 months ago. https://thecabe.com/forum/threads/miami-ad-sweet.139916/
I thought that Great Western had a double curved bar America versus arch (?)
Great Western may have been acquired by Snyder, makers of Rollfast.
The 4-hole from ebay ad has deep recesses between circles, and a fairly close drive pin hole.
I thought this almost similar one may have been a Rollfast (?)