Welcome to the
forum. Definitely looks like a nice start. I would say that half look to be fully attributable -
type, Emperor,
mint and exact issue/mint mark. The other half are at least partially identifiable -
type and probably Emperor. Again not bad these days as a start. Many do worse.
I don't want to disagree with my
good friend Molinari but some of these might clean up without resorting to the
brass brush. I would start with a nylon brush - try cutting the bristles of a old toothbrush down. Maybe one with 1/4" length and one with 1/8". By using several different old brushes you should be able to get a variety of hardnesses/stiffnesses. All will be softer than a
brass brush. Soak in DW first, maybe wash using warm water and
dish soap, then scrub with increasingly stiffer brushes.
SC