ETA SA SII-VK67

The SII-VK67 is a quartz chronograph movement manufactured by ETA SA in Japan. It belongs to Seiko Instruments' hybrid mecaquartz family, combining quartz timekeeping with a mechanical module for chronograph operation. The movement contains 394 jewels, maintains accuracy within ±20 seconds per month, and delivers approximately three years of battery life. Its distinctive feature is the mechanical chronograph submodule, which provides a tactile "click" feel when started and stopped that distinguishes it from fully electronic chronographs. The caliber remains in current production and is used primarily in Seiko and affiliated brand chronograph models.