A telescope whose line of vision is 180 degrees from the eye.
Classification: Military equipments not identified by kind
NSN 5998-01-138-0440
NSN 5925-01-459-7882
NSN 5935-01-368-2640
NSN 5990-00-038-6482
NSN 6145-01-035-7527
NSN 5985-01-424-1097
NSN 5930-00-300-3864
NSN 5835-01-501-0526
NSN 5835-00-275-0584
NSN 5996-01-194-1719
NSN 5895-01-621-5247
NSN 2925-00-859-8579