| Year | 1930 |
| Date | 31-Jul |
| Volume | 63 |
| Issue | 1,525 |
| Page | 108 |
| Category | Horology |
| Part | |
| Title | A Jig for Shaping Pallets of Dead-beat Escapements |
| Author | Geo. Gentry |
| Notes | Scale setting out of a Graham dead-beat escapement, working drawing, proportions of the sides of the double triangle |