| Issuer | United Kingdom |
| Year | 2017 |
| Type | Non-circulating coins |
| Value | 50 Pence |
| Currency | Pound sterling (decimalized, 1971-date) |
| Composition | Gold (.9167) |
| Weight | 15.5 g |
| Dimensions | 27.3 mm |
| Thickness | |
| Shape and Technique | Round Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | Obverse: Jody Clark Reverse: Aaron West |
| In circulation to | |
| Reference(s) | Sp#H48, KM#1430b |
| Obverse description | Fifth crowned portrait of HM Queen Elizabeth II right, wearing the George IV State Diadem, legend around. |
| Obverse script | Latin |
| Obverse lettering | ELIZABETH
II·DEI·GRA·REG·FID·DEF·2017·
J.C (Translation: Elizabeth the Second by the Grace of God Queen Defender of the Faith) |
| Reverse description | Design based upon elements of Proposition 11 in Book One of Newton`s Principia Mathematica, legend above, denomination below. |
| Reverse script | Latin |
| Reverse lettering | SIR ISAAC NEWTON FIFTY PENCE AW |
| Edge | Plain |
| Mint | |
| Mintage | 2017 - Proof - 395 |
| Catalog ID | 1615350770 |
| Comments |
