Nog even een foto van al m’n quartz CWC’s bij elkaar , nu het nog kan 
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Grand Seiko de beste quarts.
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Gs heeft met zijn 9F caliber zeer zeker een hele goede Quartz in huis, maar beste? Ik weet niet zeker of deze zich kan meten met het caliber 0100 van Citizen. Dus wat versta jij onder beste?
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Mijn favoriete Quartz die de grote accuraatheid intern regelt ivm de temperatuur.
Ook één van de mooiste blauwen😏
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1 links en 1 rechts op de pols dan 
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Seiko 8J is ‘beter’ dan caliber 9F…
Caliber 0100 lijkt me het beste inderdaad.
the 8J movement in general was produced from 1997 to 2011 (as far as can be established). It is considered by Seiko to be one of the best quartz movements ever produced, much better than the equally well known 9F and much more stable and accurate. It was expensive to produce and parts of the design made it hard to fit into thinner cases. The more cost effective 9F movement on the other hand is less stable, not so resistant to temperature and magnetic fields and costs about 30 percent less to produce than the 8J. But, importantly, it is thinner, and uses more common parts, therefore the frame can be used for a number of other movements and watches.
However, the 8J is, without a doubt, the most robust high accuracy quartz movement ever made. Even the fact that it had to be thicker works in its advantage, resulting in even better thermo compensation performance.
The information coming from internal specs from Seiko in Japanese, on the 8J and 9F movements, is universal, saying the 8J was the last “cost be damned” very robust movement made. The internal feeling is the 9F is less robust, less accurate, less shielded, and, yes, some of them scoff at the lack of an independent hour hand with which one easily adjusts to other time zones on the 8J.
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Die kende ik nog niet. Dank je voor de info! 
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