| Year | 1931 |
| Date | 28-May |
| Volume | 64 |
| Issue | 1,568 |
| Page | 512 |
| Category | Workshop |
| Part | |
| Title | Making a Spring Depth Gauge |
| Author | H.Dyer |
| Notes | To begin first operation, second operation, third operation, fourth operation, fifth operation, sixth operation, the body, first operation, second operation, third operation, fourth operation, clamping stud and nut |