Grand Seikoのインスタグラム(grandseikoofficial) - 10月9日 17時58分

The quartz watch, re-defined by Caliber 9F.
What makes a good quartz watch? It has of course to be accurate but precision is meaningless if the watch does not have the legibility to do it justice.
The answer must lie in long hands whose sharp angles catch the light in the dark. No quartz watch, however, could power such heavy hands until Caliber 9F was created in 1993.
Its Twin Pulse Control Motor moves broad and heavy hands. With accuracy of ±10 seconds per year and legibility to match, Caliber 9F redefines quartz watch technology.

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