When it closed in 1976, it and Ardrahan still had one. I'm not sure about Craughwell.
Mallow retained GSR signs quite late on, and GSR enamel footbridge signs were certainly in Carrick-on-Suir until the last couple of years at least. A painted-on version at Cherryville Junction was also still extant until quite recently.
Though closed to passenger traffic, the first time I traversed the Foynes branch, probably about 1978, Patrickswell and Ballingrane still had GSR enamel station nameboards, and possibly a few other places - despite not seeing a passenger train since 1963. I've a vague notion that there were a few on the Sligo line well into the 1970s, but I could be wrong.