| Year | 1949 |
| Date | 24-Nov |
| Volume | 101 |
| Issue | 2,531 |
| Page | 677 |
| Category | Horology |
| Part | |
| Title | An Electric Clock with Semi-free Balance |
| Author | Stanley J.Wise |
| Notes | Balance coil and plates, contact switch supporting columns, supporting columns and finials, baseplate, control spring collet and stud, control spring, fixed electro-magnet, finishing the parts |