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.
Examples were struck as follows:
Silver J1062/P1197 with about a half dozen known.
Copper J1063/P1198 with about a half dozen known.
Aluminum J1064/P1199 with only 2 confirmed.