Scotts #64 Lower Right Sheet With Salvage On Lower Left

Haven't posted anything in a long time. Found this this morning and it puzzles me. Looks like a lower right sheet corner stamp with salvage on lower left hand corner of stamp. Don't understand the salvage on the lower left hand corner?????? Any explanation is appreciated!

Very likely part of the next stamp to the left, thus badly damaged.
(And Scott 65 rather than 64)

Believing in simple explanations, I will suggest a theory that the user poorly scissor-cut the sheet for ease of use. They barely missed the perforations horizontally and vertically leaving some of the next stamp (perhaps cutting several sheets together with a lower sheet slightly misaligned) as they cut the sheet into strips then each long cut strip into singles. Later some of those narrow parts of the next stamp were removed.

As a test I cut up a small piece of a sheet, missing the perforations in both directions, then removed some of the extra. It created your stamp quite well.

Very good, now I know. valid explanation.
Thank you.

That is my best guess. Others may have different thinking. Your mileage may vary!

Undoubtedly this is the case. The stamp is centered strongly to the NW, leaving lots of space between the design and the perfs along the right and bottom. The bit of attachment at left is part of the right margin of the stamp that was adjacent to the left. Maybe the user had trouble separating the stamps at the perforations and tore into the stamp to the left of the one pictured, and in chagrin grabbed for the scissors. Use of scissors to separate the first US perforated stamps (1857 issue) is not uncommon, but by 1861 it would have to be considered unusual.

Actually have a 64 that was certed w a straight edge, and posted it here about 5 years ago. Cert was definitely incorrect and sent it back and corrected to say perfs cut off on bottom...Definitely no straight edges on this issue.....Ray