| Year | 1951 |
| Date | 28-Jun |
| Volume | 104 |
| Issue | 2,614 |
| Page | 835 |
| Category | Horology |
| Part | |
| Title | A Hipp Clock with Prolonged Impulse |
| Author | A.S.Prescott |
| Notes | The completed "first attempt", close-up of dial, switch, etc., view with door open, side view showing wheel work |