細節
A mid-late 19th Century vernier sextant by W.F. Cannon
with polished brass lattice frame with arc signed W.F. Cannon 177 Shadwell London, the inlaid silvered scale divided 5- 0- 155, vernier clamp and fine screw adjustment, swivel magnifier, seven shades, mirrors, mahogany handle in fitted box with accessories, the radius -- 5in. (14.5cm.)
See illustration
with polished brass lattice frame with arc signed W.F. Cannon 177 Shadwell London, the inlaid silvered scale divided 5- 0- 155, vernier clamp and fine screw adjustment, swivel magnifier, seven shades, mirrors, mahogany handle in fitted box with accessories, the radius -- 5in. (14.5cm.)
See illustration