A 19th-Century lacquered-brass direct vision spectroscope, signed John Browning, London, the lacquered-brass body with adjustable eyepiece and screw-adjustable slit, dismantling into three sections to be contained in the original plush-lined mahogany case -- 7.5/8in. (19.4cm.) wide
A 19th-Century lacquered-brass direct vision spectroscope, signed John Browning, London, the lacquered-brass body with adjustable eyepiece and screw-adjustable slit, dismantling into three sections to be contained in the original plush-lined mahogany case -- 7.5/8in. (19.4cm.) wide
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
