Over/under numbers on shots before Nikon gives up?

Hmmm. good question. I don't know much about the Nikon EFR series, but do have a question. Is it a etched glass reticle, or is the reticle some sort of wire? If it's etched glass, it might last a very long time.

If it is a wire reticle, could be your next shot, could be years from now. Just no way, so far as I know, to tell.

Good luck and keep us posted.