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    Re: Troubleshooting Kollsman Periscopic Sextant
    From: Gary LaPook
    Date: 2022 May 11, 00:29 -0700

    The distortion you are seeing is the result of a damaged pelical. It can be repaced with a piece of plastic wrap. 

    • Pellicle mirror, a thin plastic membrane which may be used as a beam splitter or protective cover in optical systems
       
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