Dublin, Wicklow and Wexford Railway (DW&WR) 50 and 51 were two 0-6-0 tender locomotives built in 1891 at Vulcan Works and were named Arklow and New Ross respectively.
The DW&WR's own Grand Canal Street were to construct two more in 1899/1900 and to follow that with a design for five more from 1904.
The DW&WR became the Dublin and South Eastern Railway (DSER) from the end of 1906.
On 23 January 1923 New Ross was hauling the 6:30 am goods train from Waterford when a large force attacked the Palace East in County Wexford.
The force organised a deliberate head-on collision with that of a cattle special from the opposite direction, which on that day to due to disruptions was being hauled by the DSER's newest express passenger engine Rathcoole.