Canon  50mm F1.5  M39 Screw Mount Lens with after market top cap . Optics are decent with light dust specs and I can see some light wipe marks plus some traces of haze plus micro hairline scratches  aperture work fine but oil on blades and focus works fine.Overall in a decent shape with some  wear. Filter ring has some dents. 

Lens will benefit from a CLA before you start using it.