early type, first KMZ logo, industar MOCKBA 22 3.5/50mm lens for rangefinders camera leica fed zorki m39. it has 10 aperture blades, later were produced with 8. the lens has very light scratches/cleaning marks, a rear element has coating imperfection, it`s not affecting the image quality. operates smoothly. You buy what you see. Have questions? ask me. paypal only. Tnx for viewing. Check out my other items!