Seiko 8F56A - Technical Guide
The Seiko 8F56A is a premier high-precision quartz movement developed in the late 1990s as part of Seiko’s elite 8F-series. Built for world travelers and professionals, this caliber offers a rare combination of features: a perpetual calendar, independently adjustable local hour hand, second time zone (GMT hand), and ±20 seconds/year accuracy. The 8F56A is considered a landmark in Seiko’s quartz watchmaking evolution, and it directly preceded the launch of the Grand Seiko 9F GMT line.
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