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JOHN BROWNING, MID-19TH CENTURY
细节
Two direct vision spectroscopes
John Browning, mid-19th century
both lacquered brass, one dismantling into three pieces in felt-lined case, the other signed on tube John Browning London, screw-adjustable slit, with clasp fitting on to tripod stand, in fitted wooden case.
15in. (38cm.) long in case (2)
John Browning, mid-19th century
both lacquered brass, one dismantling into three pieces in felt-lined case, the other signed on tube John Browning London, screw-adjustable slit, with clasp fitting on to tripod stand, in fitted wooden case.
15in. (38cm.) long in case (2)