4000475.  Lens has removable T2 mount with m42 threads. It has lens hood, but both cvaps are missing. 

Lens has been used. It looks good. I don't see anything damaged on the exterior. Filter rim looks good and it accepts filters. Front Glass does not have any scratches. But I see couple tiny fungus webbing spots. They are very small , less then 1mm. Glass has little bit of dust specs inside. No hazing. Glass looks nice over all. Lens makes nice pictures, fungus spots does not affect image quality.

Performance:

Lens has no known issues. Focus works good. Aperture blades are free of oil. Aperture blades open and close properly. Lens looks and works good.