| Issuer | Spain |
| Year | 2018 |
| Type | Non-circulating coin |
| Value | 400 Euros |
| Currency | Euro (2002-date) |
| Composition | Gold (.999) |
| Weight | 27 g |
| Dimensions | 38 mm |
| Thickness | |
| Shape and Technique | Round Milled |
| Orientation | Medal alignment ↑↑ |
| Engraver(s) | |
| In circulation to | |
| Reference(s) | KM#1434 |
| Obverse description | Head of the king Felipe VI looking left. In the lower part, between two sets of links from the collar chain of the Distinguished Order of the Golden Fleece, the coin’s mintage year. |
| Obverse script | Latin |
| Obverse lettering | FELIPE VI REY DE ESPAÑA
2018 (Translation: Felipe VI King of Spain) |
| Reverse description | Felipe VI in the act of oath of fidelity to the Spanish Constitution, in the Solemn Session of Oath and Proclamation as King that took place in the General Courts on June 19, 2014. |
| Reverse script | Latin |
| Reverse lettering | 50 ANIVERSARIO DE S.M. EL REY
400 EURO
M (Translation: 50th Anniversary of H.M. the King) |
| Edge | Reeded |
| Mint | M Royal Mint of Spain (Real Casa de la Moneda), Madrid, Spain (1591-date) |
| Mintage | 2018 M - Proof - 1 500 |
| Catalog ID | 9973953120 |
| Comments |
