Hey there Mr. Creech!,
I fir one would Really Like to See High Res Scans of the Front & Back of Mr. Sullivan's 1st Card that You Offered fir Opinion as fir Missin Red Ink.
I also do Believe that it does matter what kind of Glue was used...
Your Example has quite a bit of a Resolution Shift & I would love ta See what the Back Looks Like!
I do Respect Your Education Endeavors!
However, You did ask fir Opinions...
I'm Sure that we can all learn from one another here...
At Your Leisure, High Res Scans would be Most Helpful