From the Hour Forum:
Since in mechanical watches the main thing is not the accuracy of the move, but the aesthetic enjoyment of visual and acoustic images, as a sound specialist, I can say - if the sound-"shale-shale", in some models-*shale-shale", then this is normal. But if "bdzdzz-bdzz", or"jupa-jupa", then almost to the master, even if the move is accurate.