Help! Need to Know Maker of Trim

[Johnboy1]

I have old trim on a bathtub and shower. Probably 20+ years old. No one in town can tell me who made these parts. I need to find knobs for both before I sell this old house of mine. I thought they were Delta but Delta tells me that it would say Delta on the bottom of the trim and it doesn't. Any one recognize them?

 

[hj]

The lock nut is too big for Delta, but more likely to be Valley. A picture of the stem would verify it.