Micrometer Eyepiece with Case and Accessories, by Thomas Jones, London, Early 19th Century

Micrometre eyepiece for a telescope. Accompanied by accessories including three eyepieces, an eyepiece carrier, and four coloured filters. The micrometre and its accessories are housed in a mahogany box with a hinged lid and two swing clasps. Inside the case there are wooden supports, some of which are covered with green baize.