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细节
A late 19th Century 7in. radius vernier octant by Bainbridge Crick
the oxcidised brass frame with arc signed Bainbridge Crick Sunderland with silvered inset scale divided 5- 0- 110, vernier with clamp, fine screw adjustment and swivel magnifier, seven shades, two mirrors and telescope in fitted keystone box with accessories and trade label for Hayes Brothers, James Street, Cardiff -- 11in. (28cm.) dia, securing hooks
See illustration
the oxcidised brass frame with arc signed Bainbridge Crick Sunderland with silvered inset scale divided 5- 0- 110, vernier with clamp, fine screw adjustment and swivel magnifier, seven shades, two mirrors and telescope in fitted keystone box with accessories and trade label for Hayes Brothers, James Street, Cardiff -- 11in. (28cm.) dia, securing hooks
See illustration