Obverse
Portrays the definitive portrait of Queen Elizabeth II, designed by Jody Clark.
Lettering: 2017 ELIZABETH II DEI GRA REG FID DEF J.C
Reverse
Features a design based on elements of Proposition 11, in Book One of Newton's Principia Mathematica. The coin illustrates the Sun at the common focal point of three ellipses representing the orbits of different planets.
Lettering: SIR ISAAC NEWTON FIFTY PENCE S E I T F C H AW
