Swiss Locomotive and Machine Works United Kingdom United Kingdom

| Built | Number_ | Type_ | SLM_Number | Wheel_arrangement | Location_ | Notes |
|---|---|---|---|---|---|---|
| 1895 | 1 | Mountain Railway Rack Steam Locomotive | 923 | 0-4-2 T | Snowdon Mountain Railway | “L.A.D.A.S” |
| 1895 | 2 | Mountain Railway Rack Steam Locomotive | 924 | 0-4-2 T | Snowdon Mountain Railway | “Enid” |
| 1895 | 3 | Mountain Railway Rack Steam Locomotive | 925 | 0-4-2 T | Snowdon Mountain Railway | “Wyddfa” |
| 1896 | 4 | Mountain Railway Rack Steam Locomotive | 988 | 0-4-2 T | Snowdon Mountain Railway | “Snowdon” |
| 1896 | 5 | Mountain Railway Rack Steam Locomotive | 989 | 0-4-2 T | Snowdon Mountain Railway | “Moel Siabod” |
| 1922 | 6 | Mountain Railway Rack Steam Locomotive | 2838 | 0-4-2 T | Snowdon Mountain Railway | “Padarn” |
| 1923 | 7 | Mountain Railway Rack Steam Locomotive | 2869 | 0-4-2 T | Snowdon Mountain Railway | “Ralph” |
| 1923 | 8 | Mountain Railway Rack Steam Locomotive | 2870 | 0-4-2 T | Snowdon Mountain Railway | “Eryri” |