| Year | 1987 |
| Date | 04-Dec |
| Volume | 159 |
| Issue | 3,814 |
| Page | 664 |
| Category | Locomotive |
| Part | |
| Title | Plastic Piston Valves (PTFE) |
| Author | John Mercer |
| Notes | Reveals his methods. Making the valves. 3 1/2"g. Pacific, Chairman of Tonbridge Council, Cllr. L.Willard, SE & CR D class (Coppertop), 5"g. Schools Tonbridge |