Reverse From left to right, the country name 'Belgium' in three languages (Dutch BELGIE, French BELGIQUE, German BELGIEN). In the central part, a lion seated on a pedestal, looking to the right. The lion holds a stone in one paw, engraved with the inscription 'Belgian Constitution 1831' in Dutch and French 'BELGISCHE GRONDWET – CONSTITUTION BELGE - 1831'. Below, the inscription twelve and a half euro '12 ½ EURO', beneath it the 'qp' mark – used for collector issues. To the left under the country name, the head of Archangel Michael – the mark of the Royal Mint of Brussels, to the right the director's mark – a seated cat.
Obverse In the central part of the coin, the left-facing profile of Queen Fabiola of Belgium (Fabiola de Mora y Aragón) is struck. Below the Queen's truncation is the year of issue '2013'. Along the rim, a stylized pattern, against which a grand ducal crown is placed with its base to the left. Below the base of the crown, the Queen's name (top to bottom) in Dutch 'FABIOLA'.