I would say toned NEF. Slightly weak strike possibly from a well used die, but shield is fully intact, and the fields are absolutely clean. No issues with the coin whatsoever, as far as I can see. Only worth a few quid at most, so not really worth having it slabbed IMO, but I'd be interested in their grading when you get it back. A respectable piece in any farthing date run, or year set.