The Longacre design without stars combined with the regular reverse. This was apparently implemented by William Barber as Longacre died in 1869.
These were sold as part of complete sets from the half dime to the silver dollar. To view the set, click here.
In addition to the illustrated example is silver, for which about a half dozen are known to exist, this design was also struck in copper J1063/P1198 with about a half dozen known and aluminum J1064/P1199 with fewer than 3 confirmed.