Al, after seeing the 63 Retzer, it certainly seems likely that this 60 Aaron is legit.
In regards to the 68 Torborg, I have a Hiller #461 with a similar print defect on the right side.....I could not find an uncut sheet from this series, but I wonder if the Torborg and Hiller are next to each other on the sheet?
Here is an image of the 60 Aaron also:
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