Tested on air, one engine runs well in either direction, the other in one direction only - some work on the eccentric or slide valve setting is required.
| length/inches | 26 |
| width/inches | 12 |
| height/inches | 16 |
| weight/kg | 38 |
| wheel material | steel |
| axlebox type | plain bearing |
| cylinder material | gunmetal |
| valve type | slide |
| valve gear | Stephensons |
| reverser type | pole |
| boiler maker | Markie |
| boiler type | locomotive |
| boiler material | copper |
| boiler construction | silver soldered |
| safety valve(s) | 2 |
| safety valve type | spring |
| mechanical pump | 1 |
| hand pump | 1 |
| whistle | yes |