new balance wheel, because of the fall the incabloc broke off and was loose in the movement, also the balance wheel pinion was affected, that's why changed whole balance wheel   its bridge, lubricated automatic system, lub crown and crown stem and gasket grease, cleaned hands and dial, checked movement for any other defects, all okay,, cleaned caseback screws, cleaned glass both sides, as it was a bit sticky , adjusted timing to -2 seconds per day, error 0.0 and amplitude is 276, demag case and movement