These are entirely new movements, with every element developed and produced in-house and designed to last for decades as the foundation for a whole new generation of watches. This year, to mark its 60th anniversary, Grand Seiko has introduced two new movements, representing each of the brand’s two pillars: Calibre 9RA5 is a Spring Drive movement while Calibre 9SA5 is a traditional mechanical movement. If you haven’t yet read Part I, find the full article right here. I/trending 23304 IN-DEPTH: Grand Seiko Movements – Part II, the Spring Drives Sandra Lane
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