Thank you for viewing. Harrison & Harrison Hollywood, Calif., U.S.A. D-1 / D-2 / D-4 Diffusion Filters, set of 3. These are vintage filters used for cinema and large format cameras. They are a rare and hard-to-find product from a manufacturer that is no longer in production. The case shows signs of aging, but the filters themselves have no cracks. There is some light mold-like staining. Please check the photos for details. Recommended for both collection and photography purposes.