@Hattrick: Also, check seikoholics.yuku.com.
http://seikoholics.yuku.com/forums
Lots of good reference data as well as a sales section.
EDIT ADDITION
@Hattrick: The webmaster (Mr. Randall Benson) at seikoholics.yuku.com is also a watchmaker...he specializes in working on Seikos. About two years ago he overhauled/serviced my 6309-7049 (pictured below) that I purchased new in 1987...Randall did a great job!
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