Sankyo Kohki W-Komura- 28mm f3.5 Canon FL mount.  Tested.  Some internal dust and minor wipe marks but the lens is fully functional.  Focus is smooth.  Aperture works at all settings.  No caps.  

NOTE TO BUYERS: You are buying a vintage item.  Vintage means it is not new, and will therefore show some wear and dust consistent with age.  It may include corrosion and grime that may be visible under magnification.