This is a really sharp plate under all the muck and varnish.
I’ve got hold of an article from one of the journals on how to restore ambrotypes and tintypes. I might have a go at cleaning some plates up, I’d test it out on some old not so good plates first, of course.
The face on this chap is amazing. He must have had bright blue eyes.
3 1/2 x 2 1/2 tintype