Object is a 35mm roll-film carrier in cast metal with a gray crackle finish. Removing the lid held on with a thumbscrew exposes two axles for film spools and two cork-surfaced rollers and metal guides for advancing the film past a glass window. No other optics are provided so possibly the device is incomplete. On inside of lid is a small logo that may represent a stylized BH (Bell & Howell ?). That it was used with a 704 CRT is documented only by an identifying adhesive label located on side of unit.