19GS
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The Grand Seiko 19GS was the world’s first Hi-Beat movement for women’s watches, running at 36,000 bph. There were 6 models including a VFA variant caliber 1984A which was accurate to ±3 spd (less accurate compared to the men’s V.F.A. standard of ± 2 spd).
Photo : TheGrandSeikoGuy