This one
http://www.ebay.com/itm/1909-11-T206...item3ce1ee8171
And this one
http://www.ebay.com/itm/MOLLY-MILLER...item5b04ab0c4d
Both show the spot on the lower right border and the fine white lines in the background. But they don't have the registration marks a prominently.
The registration marks were either removed or wore off the plate in use. But the border dot and the fine lines being on multiple copies make that an identifiable individual position on one sheet. Another bit of the puzzle.
Steve B