| Year | 1947 |
| Date | 26-Jun |
| Volume | 96 |
| Issue | 2,405 |
| Page | 781 |
| Category | Trade |
| Part | |
| Title | Instrument Gears and Components (Educational Models) |
| Author | |
| Notes | A selection of gears and other instrument components, complete variable-speed friction transmission gear, remote-control dial setting transmitter unit |