Very interesting photo of Tailte in 1953 in the IRRS flickr.
Note the numberboard on the top of the smokebox, with no number on the bufferbeam!
https://www.flickr.com/photos/irishrailwayarchive/55108647485/in/dateposted/
Extra brackets on smokebox door, smokebox handle and wheel, and polished buffers. Also looks like she could be in the lighter green, though really impossible to tell.