A telescope whose line of vision is 180 degrees from the eye.
Classification: Military equipments not identified by kind
NSN 6240-01-550-8991
NSN 5998-01-109-7425
NSN 5930-01-565-3591
NSN 5998-01-310-2992
NSN 6135-01-195-5343
NSN 5985-01-444-0440
NSN 5925-01-448-9590
NSN 5950-01-059-1531
NSN 5950-00-540-9283
NSN 5998-01-545-4435
NSN 6645-01-615-9875
NSN 4140-00-872-3363