The Citizen 4-H10856 is a mechanical watch movement designed and manufactured by ETA SA Manufacture Horlogère Suisse. It operates at a frequency of 28,800 beats per hour (BPH) and has 17 jewels. The movement features automatic winding and offers a power reserve of approximately 42 hours. It includes a date function and a small seconds subdial. The Citizen 4-H10856 is a reliable and precise movement commonly used in mid-range mechanical watches.