Dr Crabtrees Patent Observatory Magnifier
Dr Crabtree's Patent Observatory Magnifier
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".
Dr Crabtrees Patent Observatory Magnifier
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