| Year | 1951 |
| Date | 24-May |
| Volume | 104 |
| Issue | 2,609 |
| Page | 665 |
| Category | Locomotive |
| Part | |
| Title | "Britannia" in 3 1/2-in. Gauge |
| Author | LBSC |
| Notes | Details of the coupled wheels, a faceplate tip, how to get the treads all the same diameter, crankpins, wheel bush, eccentrics, axles |