This is a Leica Hektor 135mm F4.5, a prime lens for the Leica M mount. It bears the Leitz Wetzlar engraving. ☆ Leica M mount. ☆ Operation has been confirmed. ◯ Regarding the exterior, there are some scuffs, scratches, and dirt, but no damage that would interfere with use was found. However, the red index mark is missing. As this is a used item, please refrain from purchasing if you are sensitive about condition. ◯ Regarding the optics, when a strong light source is applied, some cloudiness was observed on the back of the front element or on the front side of the middle element. This level of cloudiness will affect actual image quality. No mold was found otherwise. Please consider purchasing with the understanding that disassembly and cleaning may be necessary. Therefore, it is being sold as junk. It is priced accordingly. Please order with the expectation that you will receive a lens-shaped object, as it is being sold as junk. Size... α E-mount