Junghans J800.1

The J800.1 is an automatic movement manufactured by Junghans, based on the ETA 2824-2 and functionally equivalent to the Sellita SW200-1. It measures 11.5 lignes in diameter and provides a 38-hour power reserve. The movement is not in-house, reflecting Junghans's use of established Swiss ébauches for its core timepieces. It powers the Max Bill Automatic 38mm and remains in production.