Thanks all for the comments.
I'm still not sure, but it very much looks to be a "Venus something". Doesn't look exactly like a Venus 150 or a 175, based on the drawings and photos. BUT, who knows if random internet photos are correct. Please keep the insights coming!
This may only be solved by decasing it and removing the hands and dials to see if there is a mark on the dial-side (I see that's where 150s are marked).
@pdxleaf got us into the ballpark with the Venus idea. It looks a hell of a lot like many Venus 150 or 175 series. Must be a variant.
I was also thinking kind of like a Venus movement
Then
@Dan S brought up good observations on the sizing. I haven't decased it, yet, but the case ~32.2mm in diameter. My best guess the movement is no larger than 14" (31.58mm) and, looking at the photo in the case, there's at least 1.0mm of case (if not more). Putting the movement in the 12" to 13.15" range.
Venus 150 and 175 are 13''' and 14''', respectively. Easiest way to distinguish.
https://reference.grail-watch.com/ is good enough to have face layouts, sort by column wheel teeth count, and diagrams. I've been through all the 7 column options for this dial configuration and no dice.
Looking at the layout, the spring to the left of the column wheel is the unique, as is the "finger" holding the wheel to the left, and the spring further down.
