The only A class I can remember was class leader 001 with highlighted front numbers
And a number if the 141/181 class had them but disappeared in the late 1980's
But strangely enough in the late 1990's 201 class 202 was involved in a collision with none other than loco 182 and it sustained front end damage and was repaired at Inchicore and was returned to traffic with highlighted front numbers at one end .
Irish Rail 202 | Tracking the Light