Catalog
50 Pounds - Elizabeth II Alan Turing, polymer
| Issuer | Bank of England |
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| Year | 2021-2023 |
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| Composition | Log in to see details |
| Size | 146 × 77 mm |
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| Obverse description | Intaglio portrait of Queen Elizabeth II in three-quarter profile to left occupies the right half of the note, set against fine guilloche underprint work in red and brown tones; a vignette of the Bank of England's Threadneedle Street facade appears in the lower centre. At left, a vertical security window strip incorporates a multi-tone holographic foil patch with a crowned portrait of the Queen, micro-lettering, and colour-shifting numerals, topped by a transparent crown window and flanked by the value numeral '£50' in red at upper left. |
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| Reverse description | The reverse pays tribute to mathematician and computing pioneer Alan Turing, centred on a portrait of Turing alongside technical imagery evoking his foundational work in computer science, including representations of early computational concepts and binary patterns rendered in olive-green and teal tones against a complex guilloche background. A sunflower motif and cross-sections referencing Turing's mathematical biology research appear in the design, along with his birth and death years and a facsimile of his signature. |
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| Protection type | Watermark, Security thread, Hologram |
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