Coach is fitted with a Guards emergency brake valve-a compartment at one end of a Cravens coach which could be accessed via a carriage key and contained a brake valve and a vacuum brake dial,
A Guard could start train from that coach if it was the rearmost vehicle in the formation,and conduct a brake continuity test,
1558 was one of two coaches fitted with this apparatus and was generally allocated to the Limerick-Linerick Jctn shuttle until replaced by railcars,
We then had that coach for a number of years on the Ballina branch train until withdrawal.
I remember taking a photo of the compartment I must try and dig it out.