The mechanical works in a brass drum cylinder with a central fixed brass sun and articulated mechanical brass armatures mounted with ivory spheres representing eight orbiting bodies: Saturn, Jupiter and Neptune with separate orbiting moons, the model Earth a 3 in. paper globe labeled 'Lane's Improved Globe, 1818', the case engraved with month, date, and Zodiacal rings and inscribed 'Harris & Co. 50 Holborn London', with an ivory mounted crank, raised on a central column supported on three folding brass cabriole legs.