No mold inside the lens. There is some small dust and debris inside. The helicoid rotates. The aperture opens and closes. There are slight scratches on the front and rear lens surfaces. Includes front and rear caps and a 49mm lens filter. *Some coating is peeling off the lens filter. For M42 screw mount. I have included many images of the lens exterior, so please check the condition. Everything in the photos is included.