Traditionally there have been four in each of the following liveries
CIE black & tan, Supertrain black and orange, Irish rail(set of points), IE orange (Plug/socket logo)
Except for CIE black & tan the others have three pristine and one weathered. Number 171 is also IE orange but was commissioned by Marks models, I think. In addition to the original CIE black locomotives there is also a preserved CIE black & tan version of 141 which would run with the modern IE locos. That should come to 18 in total