Well made, fit and finish is to a good standard - the engine runs well on air.
| length/inches | 7 1/2 |
| width/inches | 7 1/2 |
| height/inches | 15 |
| weight/kg | 3 |
| wheel material | cast iron |
| axlebox type | plain bearing |
| cylinder material | cast iron |
| valve type | slide |
| valve gear | single eccentric |