MS28011-1 AIRCRAFT SEXTANT w/ PERISCOPE, used in larger aircraft to determine nightflight position relative to the stars. Has eyepiece with cup to view through right angle periscope with bubble level. Controls increase bubble size and adjust lens diffuser plus filters red, green & polarized. Also mechanical timer, 3-digit 100-turn counter dial, & transit case. Great experimenter/ collector item! Requires 28 V AC-DC for lights; 8"Wx13"Hx5.3"D, 23 lbs sh. (L1M,Q2J,G9B) Used w/ fiberglass case,
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