It's plastic, features Winston Churchill's face... and could be worth hundreds of pounds!!
Online collectors are paying big money for new £5 notes which bear low serial codes - with one seller flogging his three for more than £460 on eBay.
The first batch of printed notes, which entered circulation on September 13, have a serial number of AA01.
Of the 440 million notes to have been printed, it is estimated 999,999 of them carry the special code - with the very first note, bearing the lowest serial number, being handed to The Queen.
Alan Scrase, who sold all three of his 'AA01' £5 notes on eBay this week, said finding the rare polymer fivers was "the luck of the draw".
The 52-year-old struck the jackpot after visiting a bank branch shortly after a delivery of new fivers - on the day after the launch date.
He had failed to get any of collector value on the first day of issue.
"I did not get them on 13 September - the first day - but it was just by sheer chance that I went to the bank the next day and they had just got them in," he told BBC News.
"You just go in your bank and ask for them. I got a few."
After arriving at the bank just at the right time, Mr Scrase decided to put a set of three fivers with consecutive serial numbers on internet auction site eBay.
After 31 bids were made, the set was sold for £456.
He added: "I am surprised how much they have gone for.
"Any collector wants the first issue but they seem to have gone up in value very quickly."