The Aurore 4205 mechanical watch movement, produced by the Wostok Watch Factory Tschistopol, features a uniquely driven minute and second hand mechanism that enables a relatively large balance. In its older version, the movement incorporates a Breguet hairspring and a fixed stud carrier, while the newer version utilizes a flat hairspring and different mobile stud carriers. This manual wind movement also offers sweep seconds and includes a date function which can be adjusted by changing the time between 20:45 and 24h. It was commonly used during the period around 1960.