Just recently, I was able to acquire the other three of the known flown US$2 bills from this mission, including their notes of provenance of flight. You will notice that of these three -- two are sequential in serial number, which is very cool; and they also carry the blue onboard ISS stamp along with the black ISS stamp. Like the first one I acquired, these are in crisp, uncirculated condition and come from the personal space collection of Yuri Malenchenko. OF the two new sequential bills, you will also note they are just one off in number from the first bill listed. This means I own 4 of the 5 known flown bills, and I would imagine that the one still outstanding is probably the one missing serial number between the first bill, and the second of the new three. I will always be on the hunt for that fifth bill...