A small, tubular item utilizing an eyepiece, cross hair reticle, and an objective lens, to align the optical axis to the mechanical axis of a telescopic instrument. It does not have the viewing power of a telescope. It may have two like items secured in a common holder for simultaneous checking of a dual optical system.
NSN 6685-01-263-6052
NSN 5835-01-408-6529
NSN 6150-01-574-0789
NSN 6105-00-501-7681
NSN 5855-01-433-3197
NSN 6685-01-436-3475
NSN 5990-00-880-8225
NSN 5999-01-215-2214
NSN 6150-01-252-5786
NSN 5925-00-163-6982
NSN 5835-00-905-7165
NSN 5960-01-632-6576