| Year | 1946 |
| Date | 27-Jun |
| Volume | 94 |
| Issue | 2,355 |
| Page | 631 |
| Category | Railway |
| Part | 6 |
| Title | Railway Interlocking Frames. The McKenzie and Holland "Cam and Rocker" type - Part 2 |
| Author | O.S.Nock |
| Notes | Lever handle, locking mechanism, portion of McKenzie "cam and rocker" type frame for Norwich (Thorpe) Station, Great Eastern Railway, locking dog, rocker for actuating locking shaft - "soldier" |