Junghans J645.85

Caliber J645.85 is a quartz movement manufactured by Junghans. Based on the Ronda 3520.D, it measures 10.5 x 11.5 lignes (26.2mm). As a non-in-house caliber derived from a standard Swiss movement, it represents Junghans' approach to using reliable mass-produced movements in select models. The movement remains in production.