Built to a good standard, there are several nice touches such as the castellated nuts on the crossheads, delicate split pins on the brake crossbars, and neatly stamped left- and right-handed marks on the gunmetal cylinders.
The chassis runs well on air in both directions.
| length/inches | 40 + 24 |
| width/inches | 10 1/2 |
| height/inches | 12 1/2 |
| weight/kg | 64 |
| wheel material | cast iron |
| axlebox type | plain bearing |
| cylinder material | gunmetal |
| valve type | piston |
| valve gear | Walschaerts |
| reverser type | screw |
| mechanical pump | 1 |