That's a counter-stamp. Somebody stamped that on there. It's just considered damage. I haven't a clue what it stands for, if that's what you're asking.
There is some info in another CT thread that may help https://www.cointalk.com/threads/irish-political-tokens.188964/
@Laurakai RIRA.. could be Real Irish Republican Army. The Real Irish Republican Army or Real IRA (RIRA), is a dissident Irish republican paramilitary organisation which aims to bring about a united Ireland. It formed in 1997 following a split in the Provisional IRA by dissident members, who rejected the IRA's ceasefire that year.