Here are what I'm looking for. Obviously the missing official manuals are not mentioned.
I seek hopelessly...
Galetto 192 avv elet - Parts list - 1a edizione --> missing tavola 17 et 18
This table available on the floor "Technical tables and guides " of this website, is not complete. The O-ring parts is very incomplete.
During your "for making better" overhaul intervention please report dimensions and references of the bearings, gaskets rings and O-rings you change. Professionals are welcome !