Gobrecht's flying eagle half dollar struck from the obverse with the Liberty raised on the shield ribbon. This is Judd's so-called 'curved date' variety. The reverse die is also in its earliest known state with die cracks only through "F Dollar * America".
The following examples are all believed to be different:
1) Anderson-Dupont Stacks 11/54, Witham-Auction 81, Bass-HWBRF, Heritage 8/14 as NGC63, Simpson-Heritage 1/21 - PCGS63, illustrated above
2) Peale estate-Stacks 3/86
3) Stacks 4/64
4) Hughes 7/80
5) StacksBowers 11/14 - PCGS64
The Byron Reed-Durham Museum example is actually a J79A/P86.
This pattern also exists with Liberty incused on the shield ribbon, Judd's so-called 'straight date' as J79A/P86.
Judd and Pollock list both originals and restrikes existing but this is an error caused by a misunderstanding of the dies involved. No light weight (192 grain) restrikes have ever been reported for any pattern design using this obverse die.
To see both obverse dies side by side, click here.
Photo courtesy of Heritage.