Can YOU identify this Oil Bath Housing?

[BigCarl]

I have had these for a while and they have been collecting dust. I took them out of a 1957 Cadillac that my buddy had in his field. I have always assumed they came from a ~57 Caddy, but, I haven't found any with the single side opening like these have.

I have searched for oil baths, but the closest I could find to them was the "Bat Wing" style, but that has an opening on either side or is a completely different shape.

So, can YOU identify them?











Thanks in advance.