IRELAND

For Ireland Czeslaw Slania has only engraved the below two stamps.  It is amazing to see how different a stamp can appear, even when engraved by the same person.  

09.09.1974.  Centenary of «Irish Rugby Football Union» (IRFU).

There exists a distinct shade variation (a later printing) of the monochrome stamp, listed by Stanley Gibbons Specialised.