A telescope whose line of vision is 180 degrees from the eye.
Classification: Military equipments not identified by kind
NSN 6240-01-561-0326
NSN 4140-01-253-9165
NSN 7035-00-797-2635
NSN 5925-01-600-8927
NSN 5999-00-196-9945
NSN 7035-00-177-1557
NSN 6240-00-284-1457
NSN 6105-01-034-7689
NSN 5855-01-053-9684
NSN 5920-01-555-6944
NSN 6645-01-408-0011
NSN 5965-01-442-0490