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Those don't fit a mechanical movement.
The second was an electro-mechanical movement.
It's funny when someone edits his post.
It's funny when someone edits in order to be more specific?
An electro-mechanical is a mechanical movement, powered by a battery.
You have edited two times. In your first intervention you didn't say anything about electro-mechanical movement.
I said mechanical, which it is. I was responding to your first post, in which you incorrectly said "Those don't fit a mechanical movement.".
No problem. 😉