I posted here a few weeks ago about my Perpetual 100m Seiko. I have 3 of them in different colors. One went dead on me and I called out here on how to reset it. I put a new battery in in but it was 3 weeks after it stopped. Well all you have to do is pull the crown out to the first click and hold the other button in ( the one at the 2 oclock mark) for 2 seconds and she takes off and reset itself!! Yoo Hoo!! Most people here told me I would have to send it in to Seiko!!