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A piedfort is an unusually thick coin, often exactly twice the normal weight and thickness of other coins of the same diameter and pattern. Piedforts are not normally circulated, and are only struck for presentation purposes by mint officials (such as patterns), or for collectors, dignitaries, and other VIPs.
Charles Babbage (1791–1871) was an English polymath. A mathematician, philosopher, inventor and mechanical engineer, Babbage originated the concept of a digital programmable computer.
Babbage is considered by some to be "father of the computer". Babbage is credited with inventing the first mechanical computer, the Difference Engine, that eventually led to more complex electronic designs, though all the essential ideas of modern computers are to be found in Babbage's Analytical Engine. His varied work in other fields has led him to be described as "pre-eminent" among the many polymaths of his century.
The fourth coin in the Innovation in Science series celebrating the 150th anniversary of Babbage’s death.
The fifth crowned portrait of HM Queen Elizabeth II facing right, wearing the George IV State Diadem and drop earrings.
·ELIZABETH II·D·G·REG·F·D·50 PENCE·2021
Depicts the name ‘Babbage’ in lowercase, extending the ascenders and descenders on the letters ‘b’ and ‘g’ and using a geometric modernist typeface started to suggest the levers and cogs seen in the difference engines, accompanied by numbers representing the name Babbage in numerical code.