Hi Paul,
Does washer 10 go in to the bearing housing and gets held in place by the bearing? If so it is part of the shimming of the gearbox. Likewise with washer 101. If it is held in place by the final drive pinion then it is likely to be part of the shimming of the gearbox. When I have fitted a sealed bearing to a gear box I have put everything in that was in and removed the inner bearing seal so that the gearbox oil lubricates the bearing as normal but without any oil getting out.
Dave.