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| 正面描述 | Intaglio portrait of Sir Samuel Davidson (1846–1921) at right, rendered in fine engraved detail against a guilloche underprint in teal and green; a vignette of a tea dryer and centrifuge machinery occupies the centre-left, with floral decorative elements and the denomination 'Fifty Pounds Sterling' in bold letterpress. The date '1 November 1990' and the Chief Executive's signature appear at the lower centre, with serial numbers in dark ink at left and lower right. |
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| 正面铭文 | 登录 以查看详情 |
| 背面描述 | 登录 以查看详情 |
| 背面铭文 | 登录 以查看详情 |
| 签名 | 登录 以查看详情 |
| 防伪类型 | Watermark, Security thread |
| 防伪描述 | 登录 以查看详情 |
| 变体 | 登录 以查看详情 |
| 备注 |
Northern Bank Limited was a privately chartered commercial bank operating in Northern Ireland — not a central bank — yet it held note-issuing rights under the Currency Act (Northern Ireland) 1927, a retained privilege that persisted through multiple ownership changes. By 1990 the bank was owned by the Midland Bank Group, making this note unusual: a high-denomination sterling issue backed ultimately by an English clearing bank rather than any public monetary authority.
Thomas De La Rue's production at this value tier typically included intaglio printing for the main face elements, though the security specification here lists only watermark and thread — modest by the standards of what De La Rue was capable of by 1990.