| Year | 1973 |
| Date | 07-Sep |
| Volume | 139 |
| Issue | 3,472 |
| Page | 857 |
| Category | Road Locomotive |
| Part | 10 |
| Title | Building the Allchin |
| Author | W.J.Hughes |
| Notes | Dividing attachment for the mandrel, centre for change-speed wheels, planing the keyways, finish machining, broaching the centre, footnote, boiler barrel/wrapper joint |