This pattern is believed to have been struck outside the mint from dies sold as scrap that were purchased by Joseph J. Mickley.
2 of the 4 known examples show rotational doublestriking on the reverse.
The illustrated example at the top, ex Crouch-Superior 6/77, Stacks 11/08, shows a 170 degree rotation on the reverse between strikes. Click on the thumbnail image to see an enlargement.
The illustrated example below, ex Bowers and Merena 6/96, Heritage 11/03, ANR/Stacks 11/06 as NGC63BN, Simpson collection shows a 40 degree rotation on the reverse between strikes. This is currently in an PCGS64BN holder.
Photos courtesy of PCGS and ANR/Stacks.