I wish I knew more about this one--an ambrotype, found in MA, of an earlier painting, which looks Revolutionary War era to me (and him a bit like John Adams!), at the center of which is the gesture of her hand on his cuff with painted gold wedding band on her finger --though I must say it looks a bit to me like the fingers of her other hand, resting in her lap, are crossed! (And the gesture itself feels, perhaps cynically on my part, like a bit of a "calm down and be quiet" kind of a pat!) I love it too for how highly rolled up his breeches are--really quite the short shorts. I am sure with some research the artist behind the painting could be identified, and perhaps the subjects too.
In a half case, as found: 3 11/16 x 3 3/16. One dark patch to the right of his face as evident and lots of wear to the back of the case. .