to get back to the bike ID: seems very clearly to be a Menguy fork, but that frame is a production product from some place else.
Did the OP ever tell us what the BB threading is?
Judging by the BCM lugs, the single taper stays, the braze-on cable guides: it could be French, British (or even Austrian or Benelux), but better close-up pics and BB threading info are required.
edit: I didn't see that the seat post is "either 27 or 27.2", a final size confirmation would be nice, and I'd lean toward "British" or "Benelux" until I hear more.