They were of Bo-Bo wheel arrangement, weighed 80 tonnes and had a maximum speed of 90 km/h (56 mph).

They were intended for mixed traffic duties, hauling both freight and passenger trains.

B113 was presented to the Ulster Folk and Transport Museum in May 2011, but 114 was not so lucky and was scrapped in March 1995.

[1] B113 was preserved by Iarnród Éireann at Inchicore works, Dublin, and received a cosmetic restoration there.

It was then transferred to the RPSI's depot in Whitehead, County Antrim and later taken to the Ulster Folk and Transport Museum for static display in January 2012, along with NIR 101 Class No.