Details
An unusual dipleidoscope,
signed Secretan /aa Paris, the brass-cased instrument mounted on a steel base plate, hinged for levelling adjustment with geared horizontal motion, on black-enamelled iron plinth -- 5in. (14.5cm.) wide
See Illustration
signed Secretan /aa Paris, the brass-cased instrument mounted on a steel base plate, hinged for levelling adjustment with geared horizontal motion, on black-enamelled iron plinth -- 5in. (14.5cm.) wide
See Illustration