Hi all.  I have a 7002-7009 that I bought second hand in 1994 (it was manufactured in 1990). It still works quite well and the exterior is in good shape but to my knowledge it has never been serviced.  I would like to clean it up a bit, replace all the gaskets/seals, and maybe put a stainless bracelet on it and, if I'm going to open it up, maybe a new crystal. What maintenance should I consider performing on it? I live in Tokyo and approached Seiko about servicing it here and they told me the se