| Year | 1919 |
| Date | 02-Oct |
| Volume | 41 |
| Issue | 962 |
| Page | 318 |
| Category | Horology |
| Part | |
| Title | A Master Chiming and Operating Gear for Half-minute Electrical Time-Circuits |
| Author | James Perrier |
| Notes | The chimes & master clock, front view, plan of chiming operating gear for electric time circuits, end view, two views, diagram of connections, some details of chiming gear, four views |