Citizen E111

E111 is Citizen's Eco-Drive solar-powered caliber. It measures 25.6mm in diameter and 4.6mm thick, operating at a standard 32768 VPH frequency. The movement features a date complication and uses a capacitor to store energy from the solar cell beneath the dial, providing approximately six months of power reserve when fully charged. Accuracy is rated at ±15 seconds per month. The movement remains in production.