I just got back to my collection in April after a 5 year hiatus. Working from home the past month and sharing my office with my 8th grader forced me to straighten things out, and one of those things needing straightening was my stamps.

Specializing in Danish West Indies, I have my mounted collection, stockbooks, binders of vario sheets, piles of 102 cards, reference books, won auction lots, etc., all reasonably organized except for a pile of unorganized stuff hiding in a drawer. In that pile was this pictured lot that is still sealed and was an old $30 ebay purchase from 2015. As I began sorting -- I gave this card a quick glance thinking "what did I by these for" and set it aside. The next day, I did some more sorting, integrating the treasures organized from the previous day into my collection (mostly into other pre-existing piles & file boxes, stock books, and stuff to be mounted someday). I glanced at this card again. Nothing. Set it aside, still wondering why I bought them.

As I was wrapping up that evening, I took a hard look at each stamp on the card for the first time, and there was the answer to my question: The 3 Cent stamp featured the "normal frame" of a printing where 99/100 stamps in each sheet had the "inverted frame." As there were less than 1,000 sheets for this issue, there are less than 1,000 stamps with the "normal frame" (Scott 16a) that can exist.

As I have a handful of these, I'm thinking of simply keeping it in the package on my desk as a happy reminder of why this hobby is so much fun!