| Year | 1931 |
| Date | 22-Jan |
| Volume | 64 |
| Issue | 1,550 |
| Page | 84 |
| Category | Horology |
| Part | |
| Title | Notes on Clockmaking |
| Author | Geo. Gentry |
| Notes | An Adjustable Pendulum Crutch. General note, the function of a pendulum crutch, why a regulator requires a stiffer crutch, description of an adjustment, tapping and fitting the traverse nut |