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Antique Spectroscope Spectrometer by William Gaertner, Chicago, early 20th C $355.99 USD Sold on: 2013-May-12 Marketplace: eBay  6 Treasure 0 Trash   100% Detail:This an antique spectroscope/spectrometer by William Gaertner of Chicago, from the early 20th century. It is of black enameled brass with enclosed scale with vernier, telescope with draw tube focusing...  More Relevance Historical Items |
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