Probably not going to find a whole lot more info on this side of the forum either, sadly. Usually we send questions like this over to C&V but it looks like you're from there .

I find it interesting that this has a drilled fork and rear brake bridge. It seems to me that a bike with that fancy of lug work would have a specific track fork and an undrilled rear bridge. Is that paint original? Maybe this was a one-off custom frame since you said the bb shell and lugs don't match up.