I have a eta 2824-2 in a IWC mkvii and the issue is with the date. Setting the date and time is as should without issue. But when I screw the crown in the date keeps changing then half way from crown fully tighten the click out of the date change happens. Just looking for advise on what could this be (stem, mechanical adjustment....). Any help would be greatly appreciated before I ask a smith to check it out. Thanks.