This is a tintype, also known as a melainotype or ferrotype; a photograph printed on a thin piece of metal that had been coated with lacquer or enamel. They were most popular during the 1860s and 1870s, but are still made today.
This is known as a 1/6 plate tintype, since it measures about 2.25 x 3.5 inches.
Photographer and provenance are unknown.
Will be shipped safely and securely! All items are protected in archival sleeves and packaged in rigid cardstock.