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Mystery item what the heck is it?

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  • beachcomber
    Mike Brewser
    • Jan 2011
    • 284

    Mystery item what the heck is it?

    I had some aviation goodies arrive from an auction house and this was in with it, I've no idea the only wording is R107 it is a prism hand scratched on the rear is the word light. I thought it could come from a gun sight I don't know has anyone any thoughts.

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    Pedantic I haven't been that for 4 minutes 36 secs
  • Anon
    Mike Davey
    • Jan 2008
    • 2865

    Hmm. Looking at what look like precision-machined lugs (with inset, probably spring-loaded, ball bearings to hold it hard against the opposite surfaces) makes me think it is a calibrating, collimating or sighting device for a piece of equipment which requires precise alignment. The viewer peers into the 45 degree-angled mirror to view along the sighting path.

    This could be a gun, gun sight or optical equipment alignment tool. It doesn't look like an operational/flying part to me.



    • smirky
      Rank 5 Registered User
      • Oct 2008
      • 835

      Reminds me of the top of a periscopic sextant, probably an internal component anyway.


      • bazv
        olde rigger
        • Feb 2005
        • 5877

        I agree with Anon - looks similar to a Collimator/Sighting/Harmonization/Levelling device,the 6 x Location 'Lugs' look very much like collimator/levelling type mountings/locators.


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