細節
A micrometer sextant
The black brass lattice frame with index arm stamped U.S. Navy, BU.NAV.,Mark II David White & Co. Milwaukee, Wis. and numbered 3729-1941, the arc calibrated 5°-0°-145°, two light adjustable shades, mirrors and star telescope, with oak handle and brass resting pins, contained in box with makers label and instrument number to front, sun declanation index and U.S. Naval Observatory certificate dated Sep 13 1946 inside lid, brass carrying handle and securing hooks -- 11¼ x 11¼ x 5½in. (28.5 x 28.5 x 14cm.)
See illustration
The black brass lattice frame with index arm stamped U.S. Navy, BU.NAV.,Mark II David White & Co. Milwaukee, Wis. and numbered 3729-1941, the arc calibrated 5°-0°-145°, two light adjustable shades, mirrors and star telescope, with oak handle and brass resting pins, contained in box with makers label and instrument number to front, sun declanation index and U.S. Naval Observatory certificate dated Sep 13 1946 inside lid, brass carrying handle and securing hooks -- 11¼ x 11¼ x 5½in. (28.5 x 28.5 x 14cm.)
See illustration