| Year | 1955 |
| Date | 09-Jun |
| Volume | 112 |
| Issue | 2,820 |
| Page | 648 |
| Category | Workshop |
| Part | |
| Title | Telescopic Gauges |
| Author | R.J.Freeman |
| Notes | Instruments for the Accurate Measurement of Small Bores. The body, thimble, details and dimensions, telescopic units, using the gauge |