This is a vintage Sankor Cinema Projector Lens #36505 F 2.0 3.5 Inch  It comes with two pieces that it came with that appear to be to attach it to the  projector.  We inherited this and don't know a lot about lens.  We have not cleaned it etc.. It does not appear to be cracked or scratched.  It may benefit from a thorough cleaning. We are selling it as is.  Please see photos for condition and design and ask any questions.  Thank you.