【Product Information】 M42 mount. (Not K-mount) * Appearance There are fine scratches in various places, but it's clean for its age. * Optics The lens is very clean. There is only a little dust. * Operation Helicoid and aperture operate without any problems. * Accessories None. 【Product Condition】 There are stains/damage/signs of use due to use, aging, and storage. Please understand that the item will be shipped/delivered as is. Please check the images for details of the product.