Industar-50-2 50mm f/3.5 M42 Pancake Lens USSR Vintage Soviet Lens Serviced

???? Original M42 Mount. ✔ Original M42 Screw Mount. ✔ Compact Pancake Design. ???? Made in USSR. ✔ Made in USSR. ???? Industar-50 50mm f/3.5. ✔ 50mm Focal Length. This lens has been professionally serviced, tested, and is fully functional.