| Year | 1927 |
| Date | 06-Jan |
| Volume | 56 |
| Issue | 1,339 |
| Page | 19 |
| Category | New Tools and Supplies |
| Part | |
| Title | Some Experiments with a Well-known Type of Extra High-Speed Dynamo (Marble Arch Motor Supplies) |
| Author | |
| Notes | Tests on an Aero Generator Mark II. External view, detail photos of generator, explanatory diagram of windings and connections |