One of the precursors to the 1883 Liberty nickel, this pattern is similar to J1680-J1683/P1882-P1885 except that this pattern has finer dentilation on both sides and is slightly thinner in diameter 21mm vs 22mm.
Examples from this die were struck as follows:
Nickel J1684/P1886 with a dozen or more are known.
Copper J1685/P1887 with about a half dozen known.
Aluminum J1686/P1888 with about a half dozen known.
Photo courtesy of Heritage.