| Year | 1952 |
| Date | 24-Jul |
| Volume | 107 |
| Issue | 2,670 |
| Page | 101 |
| Category | Horology |
| Part | |
| Title | The Shepherd Electric Clock System |
| Author | H.R.Langman |
| Notes | The secondary clock, the striking gear, the wiring system of the master and secondary clocks, application of electricity to horology |