The Citizen 8210 watch movement, introduced around 1958, is an automatic movement with a unique feature. Unlike traditional manual-wind calibers, the winding gear is integrated within the movement itself. This design choice allowed for an acceptable height, despite the relatively high base movement. Additionally, the sweep seconds hand is driven by a magnet in a bushing, ensuring a smooth and precise motion. The end of the sweep-second arbor interfaces with a polished surface on the magnet, eliminating the need for a friction spring. Although these are some notable features of the Citizen 8210 movement, further information about its specific functionality is not provided.