This is a Bausch & Lomb Baltar 75mm T2.5 F2.3 Cine Lens in Mitchell Mount. 

Barrel shows very light signs of wear. Optically, the lens is in great shape with only very minor cleaning marks and some fine particle dust on the internal elements. Both are unlikely to effect the image quality in any way. Aperture helicoid moves smoothly. Lens has no mount and the threads where one would attach are slightly damaged but repairable.