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Do you have to change the gasket and seals everytime you open the case back? That is what my watchmaker told me. He had to do so when I had him open my Daytona yesterday to look at the parachrome blue hairspring. It took him 2 minutes to open but almost 20 minutes to close after replacing the gaskets and seals. He also did the pressure test after. +2 secs and 50 hrs of power save was his findings about the watch.
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