| Year | 1928 |
| Date | 29-Mar |
| Volume | 58 |
| Issue | 1,403 |
| Page | 293 |
| Category | Workshop Topics |
| Part | |
| Title | The "Walram" Back Gear |
| Author | |
| Notes | Head on view of original pattern 4-in. Drummond with back gear set up, back gear bracket for later pattern Drummond, detail drawings |