| Year | 1953 |
| Date | 12-Feb |
| Volume | 108 |
| Issue | 2,699 |
| Page | 205 |
| Category | Workshop |
| Part | |
| Title | An Aid to Screwcutting |
| Author | "Base Circle" |
| Notes | Screwing tool-holder for internal and external work, sn alternative arrangement, you takes your choice! Tool arranged for feeding at thread flank angle, alternative feed methods |