This is a muling of the obverse of 1851 used on J127-J131A/P149-P156 with the reverse of 1850 used on J119-J124/P134-P139.
The illustrated example, struck in either copper or copper-nickel, is the only one known. It appears to have been perforated after striking. Previously, it was part of the Chase Manhattan Bank collection and is now in the Smithsonian Institution.
Photo courtesy of the National Numismatic Collection of the Smithsonian Institution.