| Year | 1986 |
| Date | 19-Dec |
| Volume | 157 |
| Issue | 3,791 |
| Page | 686 |
| Category | Puzzle |
| Part | |
| Title | Technical Teasers and a Crossword with an Engineering Flavour |
| Author | Art I.Fizer |
| Notes | Puzzle picture, plotting the paths, the model Engineers' Christmas riddle, what is it?, curious casting, how not to turn backwards |