DManzaluni
·So here is the spring. It is made from 0.6mm thick steel, 1.46mm wide. As you can see, the shape is quite complex:
Yes, it does look kinds scary: But at some stage I am going to have to muster the courage to take the movement out of the case because there is definitely something going on inside. As you can see, there is no stem and when I just bought one to put in, I tried to insert it and some spring (!) is pushing it out again so that it can't be inserted or tightened.