[ANTIQUE MICROSCOPE]. Brass Three-Legged Microscope in Wooden Case with Attachments. London: J.Potter & Potter Auctions4.7(642)$250Oct 1, 2026
[OPTICAL INSTRUMENTS]. Pair of Electric Optical Instruments. [V.p., ca. 20th century].Potter & Potter Auctions4.7(642)$100Oct 1, 2026
A pair of brass and iron Polarimeters, 19th century and later,Sworders Fine Art Auctioneers4.4(42)£40
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