| Year | 1999 |
| Date | 09-Apr |
| Volume | 182 |
| Issue | 4,091 |
| Page | 448 |
| Category | Horology |
| Part | 3 |
| Title | A Regulator Clock |
| Author | Peter Heimann |
| Notes | Discusses lantern pinions, presents a depthing tool design, describes the collets, drills the plates. Lantern pinions, planting the wheel train, suppliers |