| Year | 1945 |
| Date | 26-Jul |
| Volume | 93 |
| Issue | 2,307 |
| Page | 78 |
| Category | Workshop |
| Part | |
| Title | Diagonal Knurling with a Straight Knurl |
| Author | Bernard J.Hall |
| Notes | Nicked packing strip, plan and elevation of knurling tool, the second impression being made, shhowing the knurling tool fixed in tool-holder |