A rare King Charles III £5 note with serial number CA01 000046 was sold for £2,800, highlighting the demand for unique banknotes among collectors.
The uniqueness of each banknote is determined by its serial number, comprising a four-digit prefix followed by six digits, making certain notes notably more valuable.
Collectors are particularly interested in serial numbers with solid blocks, like 111111, which can fetch much higher prices in the market.
The Sun emphasizes that certain prefixes, like CA for £5 notes or EH for £20 notes, alongside low-end numbers, are indicators of potential value.
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