The circuit carries the electrical charge that comes from the quartz movement components while its coil permits current to flow continuously around the watch. If you are in need of a circuit coil for your ETA watch movement, Sofly can provide you with any high-quality and multifunctional watch parts for ETA. If you are looking for an item that is not listed below, please email us at [email protected], we will try our best to find it! Get $5 off with orders over $50 with coupon: SOFLYGO.