The PCBs acquired on a local manufacturer have arrived.
The ground needed to be change to hatch and the layer Tdocu was unfortunately silk screened on the board which required me to scratch the paint over some pads on the RTC chip and resistors.
I have tried out the components on the top layer, and they are ok.
Can not say the same about the RTC library. That's one lesson we have to learn again and again: never trust 3rd party libraries - do a tryout first. At least it was possible to mount the module on the board despite the slant mounting headers.