A telescope whose line of vision is 180 degrees from the eye.
Classification: Military equipments not identified by kind
NSN 5990-01-581-5103
NSN 6320-00-270-8222
NSN 5855-01-328-7434
NSN 5985-00-513-3420
NSN 6645-00-547-4388
NSN 6145-01-129-4580
NSN 5895-01-174-7384
NSN 5960-01-495-0859
NSN 5999-01-273-6365
NSN 6145-01-450-9855
NSN 5945-01-530-8687
NSN 5920-01-410-7740