WS 9: Replacing the main spring of a Rolex Caliber 1570
Let us have a look at the rotor side of the movement. I guess it is the combination of steel, gold and purple and the golden engravings that lets enjoy looking at Rolex movements so much. And once you opened your watches, you will always see this picture in your mind when you look at the dial. At least that is what is happening to me. It is so nice to know that the beauty is hidden inside a nice Oyster case. Somehow I have never really felt to have a display back on these watches. Maybe because I just want to recall the movement picture from my mind rather then seeing it through glass. But of course, this is just my personal opinion and everyone will find its own preference regarding display backs.
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