ETA SA SL28D

The SL28D is a quartz movement manufactured by ETA SA under the Sunon brand. It displays time analogically with a date function, powered by an SR626SW battery. The movement features 377 jewels, unusually high for a quartz caliber, and is considered an affordable alternative interchangeable with the Miyota 2115. The "D" in its designation indicates the date complication, and parts sellers sometimes list it as SL28D-3.