I’m working on a census of 1st-3rd issue revenue double impressions for my website, similar to the bisect census page that I’ve already published. Initial work can be found here:

Double Impressions Census

If anyone has any of the following information, I would greatly appreciate it:

1. Any examples not shown or listed.
2. High resolution images of the actual stamps where I only show low-res images that I obtained from auction catalogs or the PF archive.
3. Public auction appearances that I don’t have listed.
4. While you’re here, please take a look at my bisect census page. I could use some help in fleshing that one out as well.

Thanks in advance.