I have a Mitutoyo 505-647 (metric scale) dial caliper that I desperately need parts for, to wit: the movement assy #901657 or if that is a no-go, then #´s 132822 - center pinion, 901659 - pinion assy, 901661 - gear assy and 132979 - spring. Most needed are the #901659 and the #132979. I know this is a long shot but spare parts for an almost 40 year old dial caliper just don´t seem to be crowding spare parts stockists shelves. Any help or useful tips would be greately appreciated.