A lacquered and oxidised-brass and mahogany ophthalmascope Unsigned . 19th Century The mahogany eyeshade surrounding the two viewing apertures, each with a prism on the other side in an oxidised-brass casing and a turning wheel to reorient each one, a third brass turning wheel at the side to bring them closer together or further apart, raised on an adjustable brass column with a circular plinth base 30.3cm. high
A lacquered and oxidised-brass and mahogany ophthalmascope Unsigned . 19th Century The mahogany eyeshade surrounding the two viewing apertures, each with a prism on the other side in an oxidised-brass casing and a turning wheel to reorient each one, a third brass turning wheel at the side to bring them closer together or further apart, raised on an adjustable brass column with a circular plinth base 30.3cm. high
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
