| Year | 1988 |
| Date | 04-Mar |
| Volume | 160 |
| Issue | 3,820 |
| Page | 265 |
| Category | Locomotive |
| Part | 1 |
| Title | Walschaerts For Gwen |
| Author | R.Atkins (New Zealand) |
| Notes | A popular valve gear designed for his 3 1/2"g. narrow gauge model. Background history, operation of the valve gear, design comment, my design process |