Killarney early 60s Black/White/Black post with white stripe on red semaphore arm, spectacle plate surrounds white, ladder black. Black on top for contrast with arm I think. Reverse: Black stripe on white arm
Reverse Tralee 1964 Lamp Holder Black Base of arm also black (although not universal)
Boyle 1961 Slight curvature to base of red
Also seen at Athlone (also MGWR) 1969, attachments to the post also contrasted against black
Cork Late 60s Silver round galvanized Metal but semaphore is white and red
Waterford Reverse side of metal gantry, base and tops still black as at Cork
Then there's an oddball somersault thingy at Askeaton, second signal appears to be the same