The product is a vintage lens with the brand Kollmorgen Optical Corp. It is specifically designed for RCA and is made in the USA. The lens has a maximum aperture, focal length, and focus type unknown, making it a unique and specialized piece that collectors or photography enthusiasts may appreciate for its historical significance or potential unique capabilities in producing specific optical effects. Now for what I do know. Brass housing very heavy piece.weighs 2.1 lbs on its own. Blow those pictures up and ask for more as needed. Made in Northampton, Mass.