Seiko Caliber 8L45 Promotion video

Caliber 8L45 is a high-quality mechanical movement that embodies Seiko’ s expertise in mechanical watchmaking, along with an uncompromising spirit of craftsmanship passed down through generations of skilled artisans. Seiko has improved the shape and design of the mainspring and implemented precise accuracy adjustments, achieving the most stable accuracy (＋10 seconds to -5 per day) among Seiko’ s current mechanical movements and a power reserve of approximately 72 hours. https://www.seikowatches.com/global-en/products/prospex/8L45