@walktowater, I am a big fan of your site " Notaphilyc Culture". I have been following your website for sometime as it is very informative.
-Thanks, I really appreciate the vote of confidence!

& centred yesterday's entry around your thread.
https://sites.google.com/view/notaphilycculture/collecting-banknotesFor grading, a great place to start is the Charlton catalogue's nine page grading section ... The next step is learning to apply this book knowledge to your own collection, which takes time and practice.
- @rxcory sums it up nicely. Arm yourself with as much grading info as possible & then try it on your own notes & start assessing each note before you see the holder (a lot of auction houses provide scans of both note & note with holder). Take your time & pretend you are the note detective & your goal is to find issues or minor imperfections. The only thing I would like to add is that
TPG also employ light boxes & put the notes up to those (+ ultraviolet light to see the note is indeed legit). Both lights will show signs of washing & processing too (not to mention magnification/loupe helps).
In yesterday's "Collector's Corner" entry, I looked for a few of the
WMG (World Money Grade) images from the
TCNC but could not find the ones I saw earlier which had clearly over graded examples. So I reviewed some possible under graded low # notes certified by
CCCS. I read the auction houses descriptions & always take a closer examination of notes that they recommend one assess for themselves. I think it is fair to state that one develops biases either "pro" or "con" graded (& ungraded) notes. Typically, we end up going with a
TPG note once the price gets high enough & you know you want a certain quality for X amount.
I also comb through as many forums as I can on the subject of GRADING & even browse distasteful threads such as those on REPAIRS, Restoration & WASHED notes since they often provide great examples of washed/repaired notes. I look for "TELLS" like a poker player reads the face of his opponents. White line where a note has been creased? That's a "tell" for me & I typically consider this evidence of a washed note. I look for undisturbed/unfaded planchettes on the 1954 & earlier series for original paper.
Another activity I often do is put on my "detective cap" when I see a high graded note without "EPQ" or "original" & then try to see what the experts discovered (for them to not grant it original status). Where or how was this note processed? The biggest take-away about grading is it takes a bit of time, a lot of patience & looking at a lot of notes before you start to get the hang of it.