Schull and Skibbereen Light Railway 1 and 3 were two 4-4-0T locomotives manufactured by Peckett and Sons in 1906 and 1914 respectively.

The second locomotive was also built by Peckett and Sons and delivered to the railway in 1914.

Both locomotives passed to the Great Southern Railways in the 1925 amalgamation.

3S survived until nationalisation when it passed to Córas Iompair Éireann.

The S&S pair were two of a class of five engines, two others went to Borneo and scrapped c. 1947, whilst the last is currently preserved on the Bay of Islands Vintage Railway in New Zealand.