Saturday, May 18, 2013

In Depth Article about the Seiko 9F Caliber from SJX

SJK has posted a great article about the Seiko thermocompensated 9F quartz caliber with some great pictures too.  Included are clear explanations of characteristic features of the 9F such as the twin pulse, backlash adjust, independent axis for each hand, instant date jumper as well as some cool pictures of Seiko's manufactured quartz crystals which I've never seen before.

Click HERE for the article.
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