| DW&WR 2 | |
| Powertype: | Steam |
| Designer: | R. Cronin |
| Builder: | Grand Canal Street |
| Builddate: | 1885–1896 |
| Leadingdiameter: | 3feet |
| Driverdiameter: | 5feet |
| Length: | 29feet |
| Axleload: | 14.5LT |
| Locoweight: | 40LT |
| Watercap: | 800impgal |
| Boilerpressure: | 1502NaN2 |
| Cylindercount: | 2 |
| Cylindersize: | 17x |
| Tractiveeffort: | 12700lbf |
| Operatorclass: | G1 (Inchicore) |
| Powerclass: | O/N T |
| Numinclass: | 11 |
| Locale: | Ireland |
| Withdrawndate: | 1925-1955 |
| Disposition: | All scrapped |
| Notes: | As re-built 1912 |
The Dublin, Wicklow and Wexford Railway (DW&WR) 2, built in 1885, was the predecessor to a total of eleven locomotives to emerge from Grand Canal Street railway works between 1885 and 1896.
Nos. 1, 6, 7 and 10, built between 1892 and 1896, had detail differences between them, Ahrons describes them as having a more modern appearance.
Locomotive No. 10 (St. Seneanus) was rebuilt as 2-4-2T in 1903. Nos. 28 (St. Lawrence), 45 (St. Kieran), and 46 (Princess Mary) were also rebuilt later in 1909/10.
On review following amalgamation into Great Southern Railways (GSR) in 1925, Nos. 1, 2 and 6 were promptly withdrawn despite No. 2 having received a new boiler in 1914. The remaining four engines Nos. 7, 9, 47 and 49 were designated GSR class 423/G1 and allocated the numbers 426, 424, 425 and 423 respectively. Unlike the other survivors, No. 426 had not been re-boilered in 1914–1916 and it was withdrawn in 1926.