The Seiko 2919-0120 is a round-shaped, ultra-thin hand-wound mechanical movement. It functions to display minutes and hours. Technical features include a balance stop. With a power reserve of approximately 43 hours, the movement operates at a frequency of 21,600 vph or 3 Hz. Its diameter measures 9.00 lines or 20.5mm, while it consists of 18 jewels. The movement has a thickness of 2.1mm and is made up of 131 components. Notable finishing includes a circular-grained mainplate, bevelled bridges, circular Côtes de Genève, and blued screws.