| Year | 1999 |
| Date | 10-Sep |
| Volume | 183 |
| Issue | 4,102 |
| Page | 324 |
| Category | Horology |
| Part | 14 |
| Title | A 3/4 Second Pendulum Electric Clock (C.R.Jones) |
| Author | John Wilding |
| Notes | Describes the back cock and associated components. Count wheel bearing, operating lever, operating pawl, crutch assembly, crutch arm, crutch foot, references and suppliers |