Could this be a late production model, when UG was on the ropes? I know they made some weird stuff at the end and this looks convincing enough.
Strange watch... I never seen another one, and my books don't mention a model like that. But the case and the strap looks clearly like Universal type. It's interesting to look into the caseback and the caliber if it's possible. That's my 281 Tricompax:
What's not convincing is a chronograph moonphase calendar with day of the week, month...but no date. EDIT: Oh wait. I see the date. Still not convinced.