A telescope whose line of vision is 180 degrees from the eye.
Classification: Military equipments not identified by kind
NSN 4140-01-258-0707
NSN 5895-01-543-2520
NSN 5950-00-320-8873
NSN 6320-01-161-6640
NSN 6145-01-591-3577
NSN 5990-01-285-1868
NSN 5975-00-955-2224
NSN 6645-01-202-7986
NSN 7035-00-205-1932
NSN 6620-01-268-9693
NSN 4140-01-152-1214
NSN 6110-01-633-9660