The Mark 3A "Cú Na Mara" set, now withdrawn, operated exclusively on the Dublin to Galway route, and was originally the BREL International Train, a showcase project designed to secure overseas orders. The set travelled to a German rail exhibition in 1988, but returned without any new orders and languished for some years before being sold on through Vic Berry. CIÉ converted the many different interior layouts to their own standard design (6201–08 ex 99521–22/24–29, Restaurant Buffet 6401 ex 99523), fitted their own Mark 3 type powered door and re-bogied with ABB bogies. Although also re-wired for Push-Pull operation the fact that an additional coach wasn't converted to a Driving Brake Standard (planned 6501 ex 99520) prevented the set from ever running with this configuration.