A TINY marking on your £5 note could mean you are sitting on a goldmine worth thousands. It's easy to miss but each banknote has a serial number which seems to be just a string of digits. 1 Special banknotes could be worth far more than you imagined However, collectors highly prize notes with specific serial numbers, and the recent auction highlighted just how valuable these can be.
Ones with quirky numbers, such as AK47 have been listed for as much as £160,000 but most have been selling for about £100. Even ones with AK46 have been listed for hundreds of pounds. Sets of notes with consecutive serial numbers - two notes with the serial numbers AA01090561 and AA01090562 sold for more than £50 on March 12.
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