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细节
A late 19th Century 7in. radius brass vernier octant
with silvered inset scale divided 5- 0- 120, vernier with clamp and swivel magnifier (lens missing), telescope, seven shades, two mirrors and semi-fluted ebony handle in fitted keystone mahogany box with securing hooks -- 11in. (28cm.)
See illustration
with silvered inset scale divided 5- 0- 120, vernier with clamp and swivel magnifier (lens missing), telescope, seven shades, two mirrors and semi-fluted ebony handle in fitted keystone mahogany box with securing hooks -- 11in. (28cm.)
See illustration