| Year | 1948 |
| Date | 12-Feb |
| Volume | 98 |
| Issue | 2,438 |
| Page | 169 |
| Category | In The Workshop |
| Part | 4 |
| Title | The Test Indicator and Toolmakers' Buttons |
| Author | "Duplex" |
| Notes | The dial test indicator, setting work with the test indicator, the centre-finder or wobbler, the use of stub mandrels for centring work, toolmakers' buttons |