| Year | 1931 |
| Date | 23-Apr |
| Volume | 64 |
| Issue | 1,563 |
| Page | 388 |
| Category | Locomotive |
| Part | |
| Title | Half-inch Scale Baker Valve Gear |
| Author | H.J.Coventry |
| Notes | Main and side rods for 3/4" scale Baltimore and Ohio R.R. P7 class Pacific, details of Baker valve gear, main and side rods for 1/2" scale B. & O.R.R. class P7 Pacific |