mmm, I would say these watches are put together and not original, aka fakes!
To solve the issue once and for all we would need shots of the case backs, inside and outside, so to see if they are indeed UG cases (from both the serial numbers as well as the hallmarks).
The shape of the cases doesnt look UG, also the dials, given the shape of the logo and brushed finish, would be from end of 50s/60s (I say would because I don't think they are legit either) but the Valjoux 22 is a caliber used in much earlier chronographs...