By a Maker of Rock-Crystal Lenses, French, late 1830’s, signed “Rossin, nev. et succ. de Chauchoix.” Opening from 3-1/2″ to 6-3/4″ (9 – 17 cm), this large “monocular” is made of gilt brass with two drawtubes, the bell-shaped main tube bound in four floral-filled panels alternating red and brown. The singlet objective is a full 2-1/4″ in diameter, and with the thick bi-concave eye lens gives bright erect images. Focusing is by helical thread to the first drawtube. Condition
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