This is the 1857 high date obverse as used on J289/P226 combined with an 1860 reverse die not used on any other pattern struck in copper. This resulted in "United States of America" not appearing on either side.
About a half dozen are believed to exist.
4 obverse die trials JA1857-3/P3140, struck in white metal are also known.
The illustrated example is the former McCabe, Eliasberg example courtesy of American Numismatic Rarities.