From the first Helios-44-2, the glossy version. Production - BeloMO, 1981. Gives a great bokeh - blur back motley background. Specifications: Format: 35mm mirror Type: Constant focal length (fixed) Focus: Manual Focus System: M42 Optical design: 6 elements in 4 groups Focal length: 58mm Aperture: f / 2.0 - f / 16 Petal Aperture: 8 Diameter of filter thread: 49mm Weight: 230g Length: 57mm Year of production: 1981 Product condition. Good condition! There are micro scratches on the back of the lens. The mechanics are working properly.