C.A. Steinheil Sohne, Muenchen
Set of 6 aplanatic loupes with handle and loupe stand, c. 1880
(Aplanatische Loupen)
Retailed by Murray & Heath, 69 Jermyn St., 43 Piccadilly

D. Lardner, The Microscope, 1856:

Advertisment from the Journal of the Royal Microscopical Society, 1880
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