ETA SA SII-VK63

The SII-VK63 is a quartz chronograph movement manufactured by Seiko Instruments in Japan. It delivers accuracy within +/- 20 seconds per month and uses an SR936SW battery with an estimated life of 36 months. The movement is essentially identical to the Seiko 6T63, differing primarily in that it is produced for non-Seiko watch brands. A distinctive feature is its hybrid mechaquartz design, combining quartz timing with a mechanical module for the chronograph function. It is used by brands such as Pagani Design and Dan Henry.