GRACE'S SPECTROSCOPE IN SHAPED CASE by JOHN BROWNING
S07-036. English, 4th quarter 19th century, signed in script "Grace's Spectroscope" and "John Browning, 63 Strand, London." Made of lacquered brass, 5 3/4" long x 7/8" diameter, with a knurled ring for slit adjustment and focussing by a knurled knob operating an eccentric arm. The spectroscope is in very good overall condition in its original leather covered shaped case.
