| Year | 1931 |
| Date | 20-Aug |
| Volume | 65 |
| Issue | 1,580 |
| Page | 175 |
| Category | Locomotive |
| Part | |
| Title | Multi-purpose Steam Cylinders. Principally for Outside Cylinder Model Locomotives |
| Author | Geo. Gentry |
| Notes | Form of piston head, the main steam chest cover, the slide-valve and rod, the valve rod, machining the valve, the end valve chest covers, machining the covers, steam chest stuffing box covers |