English, c.1860, signed to the stage 'Wm Harris & Co, 50 High Holborn, London', the microscope of typical form but with later adjustments including relocating the three-stage supports to one side and the addition of a fine focus screw to the bodytube, with rack and pinion focusing, single mirror in a gimbal, drawer with 5 objectives, fish plate and other accessories, in a polished mahogany pyramid-shaped case,