This type of relievo ambrotype placed the image glass OVER the mat to give it an added three dimensionality. This sixth plate is one of the best I’ve seen. There was a maker in western MA I think who made these, but this one is not identified. The little kit is relaxed against the sofa and kept his hat on. The sixth image is in fine condition and has a white card backer, as some of these relievos did. The case has a split spine.