Dr Crabtree’s Patent Observatory Magnifier
7176 Observatory Magnifier, £17.99
Believed by some to have been designed in 1804 by the legendary British inventor and polymath Joseph Crabtree, the functional simplicity of his brass-and-glass domed "Observatory" magnifier has never been surpassed or needed modification.
Magnifies about 3x. Diameter 2", height 1".
You may also be interested in: