A mechanically and optically fine eyepiece analyzer and goniometer by F. Koristka, Milano c.1900. Designed to fit a 25 mm. ( 1″) body tube, two parts with dark prisms intact at both ends. Most of the silvering of the 360 degree goniometer intact. c.1900. In original blue velvet lined, brown card case with makers name and address.
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Mark Hacking (Scientifica Opticae Inc.) has been an avid collector/dealer for over 30 years. A former Science teacher, he has an innate love for anything natural or mechanical. Specializing in optical (microscopes, telescopes), surveying, medical, weighing and drawing instruments, he is an active participant of the Scientific Instrument Fair in London. Living in Stratford, Ontario, Canada, with his wife and two children; Mark looks forward to meeting as many fellow collectors as possible, and has a worldwide following on eBay (Sciopti).
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