The ten shilling is the only Irish coin to feature an inscription on edge until the Irish euro coins, this is "Éirí Amach na Cásca 1916", which translates as "1916 Easter Rising"; the inscription was in Gaelic type on a plain edge. Approximately half of the inscriptions were inverted, making them no scarcer than the upright type. The coin is also unique in being the only modern circulated Irish coin (before the introduction of Euro) not to feature the harp on the obverse side, instead featuring the portrait of Patrick Pearse the revolutionary, further making it unique among Irish coinage in that it is the sole coin to feature the image of anyone associated with Irish history or politics, apart from monarchs. This coin is the first Irish commemorative coin issued by the Irish state, first Irish modern coin to feature a person, and the first official coin to commemorate the 1916 Easter Rising. Also interesting, the thickness of this coin is uneven, the edge of the coin being thicker than the centre.