细节
An early 20th Century brass vernier sextant
the arc indistictly signed with inset silvered scale divided 2- 0- 150, vernier with fine screw adjustment, clamp and swivel magnifier, shades, mirrors and ebony handle, in fittled box with accessories, the raduis -- 7in. (18cm.), the box -- 10in. (27.5cm.) square
See illustration
the arc indistictly signed with inset silvered scale divided 2- 0- 150, vernier with fine screw adjustment, clamp and swivel magnifier, shades, mirrors and ebony handle, in fittled box with accessories, the raduis -- 7in. (18cm.), the box -- 10in. (27.5cm.) square
See illustration