A distinctive retouch of the vertical line of the left numeral box.
Research notes:
Confirmed by LB using the plate proofs at LAC.
Leo's Notes
The bottom half of left vertical line of the LNB is thick; however, the left and bottom lines are very faint at the LL corner.
The LL corner of the bottom frame has a gap on the left outer edge as though the left frame stopped short of the bottom.
Smudge in the UR corner of the third A in CANADA.
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