拍品专文
Alexander Dobbie worked between 1844 and 1885 from three addresses in Glasgow.
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细节
A mid-19th Century 9in. radius octant by Dobbie
In ebony and brass with ivory scale divided 2- 0- 105, vernier clamp with fine-screw adjustment, signed in ivory on cross bar ALEXR. DOBBIE. GLASGOW , double pin-hole sight, five shades, two mirrors, brass pin feet, keystone case (lid detached) -- 12in. (31.5cm.)
See illustration
In ebony and brass with ivory scale divided 2- 0- 105, vernier clamp with fine-screw adjustment, signed in ivory on cross bar ALEX
See illustration