Single cylinder with slide valve, fish-bellied connecting rod, overhung crank, complete with a rather nice little Watts governor which may have been fitted at some stage, judging by spare holes in the base plate.
| length/inches | 13 |
| width/inches | 7 1/2 |
| height/inches | 5 1/2 |
| cylinder material | brass |
| valve type | slide |