A telescope whose line of vision is 180 degrees from the eye.
Classification: Military equipments not identified by kind
NSN 6645-01-076-4655
NSN 5895-00-161-6090
NSN 5996-01-564-4654
NSN 5998-00-457-4656
NSN 5999-00-546-9493
NSN 6150-01-199-8705
NSN 5935-01-513-3559
NSN 2925-00-355-5130
NSN 5930-01-320-1626
NSN 5905-01-012-9180
NSN 2925-00-707-6770
NSN 4140-01-510-9844