8L45
Mechanical movement befitting the flagship model.
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.
Seiko's original technology
SPRON is a Seiko original alloy. Used for the mainspring and hairspring, it was developed to be resistant to tear, corrosion, and wear. The 8L45’ s use of this special alloy makes the caliber long-lasting with stable precision.
Diashock is a structure developed to enhance the movement’s resistance to shocks. It is used as a bearing, such as for the balance wheel pivot, a section of the movement that is especially sensitive to shocks and jolts. With Diashock, the structure maintains high stability even when subjected to sudden shocks.
Caliber Number：
8L45
Movement Type：
Automatic with manual winding
Precision：
+10 to -5 seconds per day
Power reserve：
Approx. 72 hours
Jewels：
35
