| Year | 1939 |
| Date | 27-Apr |
| Volume | 80 |
| Issue | 1,981 |
| Page | 492 |
| Category | Horology |
| Part | |
| Title | An Electric Clock from Scrap |
| Author | R.Boocock |
| Notes | Armature, magnet, contact board, contact screw pillar, contact breaker, general arrangement, mounting on blackboard, magnet bracket, connections |