Drogheda 3, (Dalton & Hamer, page 459)

Denomination: halfpenny, scarcity: Very rare (RR)
3. O: A female seated holding a harp. FOR . THE . PUBLICK . GOOD . ->*<- . 1792 
      . ->*<- .
   R: A cypher I M Co. MAY IRELAND EVER FLOURISH .->*<-.

No. 3, RR.

Keywords

for the publick good,1792,i m co,may ireland ever flourish