It always amazes me how far the hobby has come with the help of research. Back then, there was no information as to what the changeovers were, prefixes and quantity printed, etc.
Now, I have a question: do you think the grades Ch Unc and Gem Unc came with the advent of TPGs, or they were known and recognized among serious collectors and just never mentioned in the price guides? I remember when I bought my first notes in 1989, I never saw these superior grades.
Thanks for the memories!