| Year | 1949 |
| Date | 01-Dec |
| Volume | 101 |
| Issue | 2,532 |
| Page | 688 |
| Category | Horology |
| Part | |
| Title | An Electric Clock with Semi-free Balance |
| Author | Stanley J.Wise |
| Notes | Assembly, electro-magnet and othe items of the dial mechanism, layout of impulse dial mechanism, wiring diagram, poising the balance, wiring of clock and impulse dial |