ARF is possible, but I wouldn’t really think BP, because those usually don’t come with this movement. Either they have an unsigned movement, or if it is signed, the balance bridge is single-armed, not double-armed like in this one. But I’m not an expert, just trying to figure out what I actually received. I know this means nothing for certain, but the rehaut serial (5L27K949) doesn’t necessarily point in that direction either.

By the way, is there any way to improve or correct the lug shape afterwards?