 The stamps were designed by R.J. King and recess printed by Waterlow and Sons , London , until 1961 , and thereafter by De La Rue & Co , Dublin . The designs feature the Flight of the Angel Victor – Messenger of St. Patrick – carrying the Voice of the Irish ' Vox Hiberniæ ' over the world flying over four well @-@ known Irish historical landmarks , one from each of the four provinces of Ireland : Lough Derg ( 3d and 8d values ) , Rock of Cashel ( 1d , 1 / 3 and 1 / 5 values ) , Glendalough ( 1 / - value ) and Croagh Patrick ( 6d value ) . These were printed in sheets of 60 stamps with an ' e ' watermark . 
