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50 Pounds - Charles III Alan Turing, polymer
| Issuer | Bank of England |
|---|---|
| Year | 2023 |
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| Currency | Pound sterling (decimalized, 1971-date) |
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| Obverse description | Log in to see details |
|---|---|
| Obverse lettering | Bank of England I PROMISE TO PAY THE BEARER ON DEMAND THE SUM OF FIFTY POUNDS Fifty Pounds © THE GOVERNOR AND COMPANY OF THE BANK OF ENGLAND 2023 |
| Reverse description | The reverse pays tribute to mathematician and computing pioneer Alan Turing, with a table of numbers drawn from his seminal 1936 paper on computable numbers at centre, surrounded by technical imagery evoking early electronic computation, including a representation of the Pilot ACE computer. A portrait of Turing and a ticker-tape sequence encoding his birth date are incorporated into the design, executed throughout in deep red-brown tones over fine-line guilloche patterning. |
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| Protection description | Large security window strip with holographic crown and colour-shifting '50' numeral integrated into the polymer substrate; portrait watermark of HM King Charles III visible within the clear window area; optically variable denomination numeral. |
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