| Year | 1973 |
| Date | 02-Nov |
| Volume | 139 |
| Issue | 3,476 |
| Page | 1,049 |
| Category | Road Locomotive |
| Part | 12 |
| Title | Building the Allchin |
| Author | W.J.Hughes |
| Notes | The bevel gears, centre for left-hand bevel wheel, the compensating centre, fitting the spigot, setting out, planing the pinion seats, machining the winding drum side, drilling jig for pins, fitting the spur ring, using the jig, completing the centre |