| Year | 1944 |
| Date | 14-Sep |
| Volume | 91 |
| Issue | 2,262 |
| Page | 259 |
| Category | Nautical |
| Part | |
| Title | A Propeller Boss Slotting Jig |
| Author | L.G.Callis |
| Notes | The complete assembly, view of base with guide blocks in position, details of the fittings, four views of the support bracket |