Keystone Manufacturing Catalog of Films and Accessories from between 1925 to 1941 Breadcrumb Navigation Derrick Clow Published: December 6, 2013 Categories: Camera Equipment Catalogs Keystone Manufacturing Catalog of Films and Accessories from between 1925 to 1941 This catalog has seven pages for films and accessories. It measures 5.75″ x 9.25″. From my private collection.