† Barrer Centre, Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K. ‡ Department of Materials, Imperial College London, South Kensington Campus, ...

"While sets of the Kruger notes are extremely rare in themselves, what makes this set unique is that this set...is serial numbered 0001," said Spink. "However, the number one serials on the one, five ...