I have a few of these movements in slightly different flavours (8900, 8906, 8602, 8400), and they are pretty quiet all the way around. It’s tough to hear the rotor, or even the crown. I wouldn’t be surprised if the overwind was likewise quiet. These movements also have two barrels, which may account for some of the difference in sound and feel compared to the single barrel 8800 design. As a general rule, I avoid winding them more that a few turns (just to get the second hand moving so I can set the correct hand). Some automatics don’t handle a lot of manual winding very well.
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