An unusual condenser, with a set of stops instead of an iris diaphragm. The diameter is a standard 39mm, so it will fit a wide range of Victorian microscopes, but in fact came from one of the earliest Watson microscopes.
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Ganymede Antiques, established in 1992, is based in Muswell Hill, London, U.K. We specialise in scientific instruments from the 18th and early 19th centuries, with particular interest in sundials, and drawing and calculating instruments. We are always keen to buy interesting instruments, and entire collections. We exhibit at the twice yearly International Antique Scientific Instrument Fair in London. Keith Petts can be contacted at email@example.com