No I have not, Bob, but for what it’s worth, way back in 1952-53, there was a printing issue with the very first run of $1.00 Paper Bills under Queen Elizabeth II.
The ink the two printers in Ottawa were using on the reverse side of the bills was the wrong formula. If the reverse side of these bills was washed with HCl Acid, the green ink turned the same blue as the $5.00 Bill of the same new series.
Don’t ask me how I know.
All the Best to You and Yours in 2024!
David
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