This instrument is called a "pocket botanical microscope," obviously because of its small size and portability. It has a single lens, an ivory handle, and an adjustable specimen holder that slides in a grooved brass plate for focusing. It can be dismantled and carried in a small case for use in the field. This magnifier is 9.5cm tall by 7cm deep.

It is not signed, but it is certainly of English origin and an estimate of its age would be circa 1775–1800. This instrument is identical to the W. & S. Jones Naturalist's magnifier of 1798 as described in Turner, Collecting Microscopes (1981).