This is an auction for the INDUSTAR 61 L/Z MC, famous for its star-shaped bokeh. It's an M42 mount lens. Front and rear caps are included. Some sellers falsely claim that their lenses produce star bokeh, but are actually selling the earlier models that don't. This is the later model, which clearly produces star bokeh. There are some scratches on the body, but it's in good condition for an old Russian lens. The lens has been disassembled and cleaned. It has also been greased, and the focus and aperture rings move smoothly. There is no mold or haze inside the lens. It maintains a clear condition. Due to the lens's construction, it's easy for tiny dust particles to get inside. I've removed them as much as possible, but there may be some minor particles present. Both the aperture ring and the focus ring function correctly. As an aside, if you don't have an adapter, I recommend purchasing one from K&F Concept. Inexpensive adapters that cost less than 1000 yen may lack precision, so it's safer to buy a reliable one. If you have any questions, please ask. I will answer them as best I can. I am also selling other rare Soviet-era lenses, and I plan to increase the number of listings, so please take a look.