Delicately proportioned, the engine turns over freely with some wear evident in the eccentric, main and big end bearings - it runs beautifully on air.
| length/inches | 7 |
| width/inches | 5 1/2 |
| height/inches | 11 |
| weight/kg | 3 |
| bore x stroke/inches | 5/8 x 1 1/4 |
| wheel material | cast iron flywheel, 5 1/2 inch diameter |
| cylinder material | gunmetal |
| valve type | slide |
| valve gear | single eccentric |
| governor type | Watt |