WS 9: Replacing the main spring of a Rolex Caliber 1570

Of course like in the case of the Caliber 3035, I used the Bergeon 5700Z opener. But since I published both articles in a very short time, I want to give you some change. So simply to illustrate, this is the much less expensive manual version of the Rolex case opener. Since the grooves on the Rolex backs are indeed a pretty genius piece of mechanical engineering, the manual opener is perfectly sufficient if you do not have to open 5 Rolexes a day.

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