Very odd combination. No question in my mind that the caseback, dial and crown are legit, or at least of UG manufacture.
I would be wary of the case, unless there is a UG signature somewhere. The watch looks to be of late 1950's vintage, but the case screams 1970's bling.
Why would someone spend that kind of money on what looks to be a custom made, solid gold integrated case?
gatorcpa