Please leave new "sightings" of Proof Platinum Coin Seigniorage items -- whether old or new -- in comments below, or contact the blog!
And see here  for an interpretation of the data, at least from the perspective of the blogosphere.
NOTE The number of items seems to challenge the scale of the map. I should debug the map to make sure the background and all of the phases look perfect... And when I have time I will!
1. Click in a blank area and drag right to go back in time. Drag left to go forward in time.
2. Dragging the top (summary) timeline drags the bottom (detail) timeline along with it, but faster.
3. Tickmarks in the top timeline show links in the bottom timeline.
4. Click a link/dot for a popup with more information, including a link to the original.
NEW Here is a table of the same data , which you can sort and search by author, title, and date.Displaying 1 - 559 of 559 entries