This is the second set. The first set was made for Truman and it is on display here with the history --> http://www.archives.gov/publications/prologue/2003/spring/truman-poker.html I had heard Eisenhower had the set aboard Air Force ONE but I assumed it was the same set, handed down to the next president. That theory had holes in it, but now with this set coming out of hiding... it seems we have two sets... one for each president. This is a major find Dave but I would think to get the maximum value for the set they would have to be authenticated. I am excited to see how this thread developes because there are many collectors that know much more about the history of these chips than me.