| Year | 1926 |
| Date | 29-Apr |
| Volume | 54 |
| Issue | 1,305 |
| Page | 454 |
| Category | Horology |
| Part | |
| Title | Turning Arbors for Electric and Other Clocks |
| Author | |
| Notes | Proportions of a finished centre arbor for an electric clock, stages in the chucking of the material for producing a clock arbor |