I was particularly fond of the 1812/1 overdate from that year.

Yes, I used to be a BHNC member for several years. In order to become a "Bust Nut" ... one had to have a minimum collection of over 100 Overton die varieties and be sponsored by another BHNC member who has viewed your collection and vouched for your grading standards and attribution skills. The club had pretty tough selective standards to get in when I was active in the hobby..., and still does to the best of my knowledge.