| Issuer | Ireland |
| Year | 2015 |
| Type | Non-circulating coin |
| Value | 15 Euros |
| Currency | Euro (2002-date) |
| Composition | Silver (.925) |
| Weight | 28.28 g |
| Dimensions | 38.61 mm |
| Thickness | |
| Shape and Technique | Round Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | Rory Breslin |
| In circulation to | |
| Reference(s) | KM#87 |
| Obverse description | Harp at centre. éire to the left, 2015 on the right |
| Obverse script | Latin |
| Obverse lettering | éire
2015 (Translation: Ireland 2015) |
| Reverse description | Walton and Cockcroft’s experiment. At the bottom of the design is an atom, an arrow points upwards to Lithium 7. An arrow points upwards to the left to an explosion. An “E” for energy streams upwards from the explosion. Einstein’s theory of special relativity “E=MC2“. On the left, two Helium (alpha) particles. |
| Reverse script | Latin |
| Reverse lettering | 15 EURO ERNEST WALTON 1932 E E = mc2 p 7 Li |
| Edge | Milled |
| Mint | |
| Mintage | 2015 - Proof - 6 000 |
| Catalog ID | 7651156660 |
| Comments |
