Large Double Prism Spectroscope
by John Browning, double prism model with lacquered brass telescope and collimator, lacquered base with chasing, scale reading to one arc minute by vernier, signed 'John Browning London', in mahogany case
Sold for £336
Result plus buyers premium
by John Browning, double prism model with lacquered brass telescope and collimator, lacquered base with chasing, scale reading to one arc minute by vernier, signed 'John Browning London', in mahogany case