There are two things which have always struck me as literally beyond belief. One is the workings of an old Swiss, or any other country for that matter, watch.
The other is a crankshaft. Those things just have to be incredibly complex to manufacture, yet they have been making them for a very long time.
Would love to know more about this inventor/mechanic, and the process by which he reverse-engineered a real fullsized V-12, and which V-12 he is fact based his engine on.