Local auction house has this cute tin-type for auction. Not my area, but thought it might be of interest.
Not identified, at least in the auction description. I think the estimate is $30-$50. Case is complete and looks in good condition. What struck me is that she is sort of smiling rather than looking a bit grim as so many do in early photos.
She does looks like she is enjoying herself and her surroundings and is perhaps anticipating another nice or interesting thing taking place.