I have no idea why this was done. But surely this was not a professional service.
I use to say, cleaning and oiling an old clock, maybe repairing some worn parts is not the hardest work. The real trouble is to fix damages caused by people that does not know what they are doing with their hands full of fingers.
As example I received a Junghans mistery swinger for repair… Someone just destroyed the pallets. Arbor missing, broken pendulette, pins of pallet replaced with absurdely thick wire glued there… I had to make a completely new part from zero.