@Randy Hester: I have googled "Froment" and found out that this is a detail of Paul-Gustave Froment's electric motor, 1844, cf. https://en.wikipedia.org/wiki/Paul-Gustave_Froment
Thanks! It was done using my parallel view, so it must be seen in the parallel mode, otherwise, the image is cut in the middle and it is bad. You can watch it cross view in the parallel mode, it doesn't matter.
Thanks for your advice! Las, I am a heavy worker in everything I do and I am unable to choose among my works… If you have not enough time, you can choose to explore only one folder, Flowers, by example…
If you don't mind me making a recommendation/request... I would prefer if you posted only a few of your best images. I don't have time to look at all of them and as a result, I am probably missing the really good ones like this image.