Telegraph pole signs.

These 4 signs are curved to fit on a telegraph pole. The first and last warn against the old pastime of breaking insulators with stones. The SE on the first sign stands for Saorstat Eireann or Irish Free State and dates this sign between 1922 and 1937. The P&T on the third sign stands for the department of Posts and Telegraphs.
The last sign is headed VR for Queen Victoria (Victoria Regina) and is cast iron. This version was used in Ireland and Britain until 1901.
The first 3 signs have text in both Irish and English.