I'm not complainning. I'm just saying, 5 years ago, we did not have dfferent types of Unc's. An Unc note was flawless note, period. In fact, I remember a time when there was no AU either. Just EF and UNC.
Well, 300 years ago, we didn't have EF or Unc either because nobody was collecting paper money because paper money didn't exist. So if you want to be a true purist, you wouldn't collect anything.
But seriously, long before Charlton adapted the tiered Unc grading system, a number of dealers used terms like Choice Unc and Gem Unc. I can remember seeing these terms being used in the 1990s. The system existed, but it wasn't endorsed by any paper fraternities in Canada. You're more than welcome to use grading standards that were conservative even in the 1960s. Just remember to be consistent and use these same standards when selling your notes in the future.