A pair of almost horizontal lines just above the top margin at right, which extend well into the right margin. There are two (possibly 3) dots near the upper right corner that touch the line.
Research notes:
Plate position determined by Jim André using the plate proofs at LAC.
The lower of the pair of lines in the upper right corner seems to show the curve of a downward-facing arc.
Flaw in Zone 4
Plate Position: 4UL31
Reported by WGB
Format ~ Sheet
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