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| 背面描述 | The reverse features a bold high-relief portrait of Sir Isaac Newton facing slightly left, rendered in a baroque engraving style with flowing long hair characteristic of the late 17th-century period. Behind the portrait, symbolic references to Newton's principal discoveries are depicted, including a pendulum or orrery device and a falling apple, alluding to his laws of gravitation and celestial mechanics. The legend ISAAC NEWTON 1642–1727 arcs across the upper field. A facsimile of Newton's signature, Is. Newton, appears in cursive script in the lower field, adding an authenticating personal touch to the design. |
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| 铸币厂 | Royal Mint (Llantrisant, United Kingdom) |
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| 附加信息 |
The quarter guinea denomination has no continuous history in Gibraltar — this is a modern bullion and collector issue deliberately invoking the old English quarter guinea, which was minted only sporadically in Britain between 1718 and 1762 before being abandoned as impractical. Gibraltar's use of the type is essentially a licensing of nostalgia. The Newton connection ties to Isaac Newton's long tenure as Master of the Mint from 1699 to 1727, during which he reformed British coinage and prosecuted counterfeiters with personal zeal — including attending executions.