| Year | 1961 |
| Date | 20-Apr |
| Volume | 124 |
| Issue | 3,119 |
| Page | 488 |
| Category | Locomotive |
| Part | |
| Title | "Firefly", a GWR 4500 class 2-6-2 tank engine in 3 1/2, 4 3/4 and 5 in. gauges |
| Author | Martin Evans |
| Notes | 5 and 4 1/16 (4 3/4?) in. gauge crankpins, eccentrics, coupling rods, connecting rods and brake gear, brake blocks, pull rods |