My grandfather George in the year of his birth, 1884.
This tintype of my grandfather was folded in half. My guess would be that was done so that his father could carry the picture in his wallet.
The tintype provided a kind of "instant" photography print that was the most popular way of creating family photographic portraits in the U.S. for fifty years prior to the development of Kodak roll film at the end of the 19th Century. A thin black-enameled iron plate was coated with a light-sensitive emulsion; the image recorded on the plate was a negative, but the black background made it look positive. Itinerant photographers often made the tintype exposures in peoples' homes, and the plates could be processed in a few minutes.