| Year | 1929 |
| Date | 05-Dec |
| Volume | 61 |
| Issue | 1,491 |
| Page | 531 |
| Category | Horology |
| Part | |
| Title | Electric Chiming and Striking Clocks |
| Author | F.Booker |
| Notes | Some Notes on the Construction of Motor-driven Gear. The switch plates showing method of insulating them, movement |