This is a complete but damaged flight model (Tube 121) image tube designed and utilized by John Lowrance in the mid-to-late1970s for electronic imaging capabilities for space telescope applications, notably for the Hubble Space Telescope. This specific example was dropped during inspection in the Lowrance laboratory in 2007, but the curator decided that it still warranted accession because the breakage actually serves to expose the internal parts for better inspection. It is one of several examples accessioned from John Lowrance's company that represent the state of the art for this class of detector at the time NASA decided to switch from this technology to solid state CCD detectors for the Wide Field Planetary Camera.