I think this is an odd array of contact points on this motor. I have about 20 motors I kept with contacts like these but only this one has so many. the others only have 4 on each. I know if it is gold it is a very tiny amount and this motor is a good example of just how thin gold can be. You can not see the edge in any way. You can just hardly feel the edge of each contact with your finger nail.
once I build up a collection of these, what would be the way to get the plate off?
Seeing it is so flat and easy to get to would scrapping be an option?