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    Re: Telescope Collimator MK-VI
    From: Frank Reed
    Date: 2013 Jul 15, 12:15 -0700

    You wrote:
    "Is this item used to calibrate bubble sextants?"

    I'm not entirely sure what it was for. In the photos it's labeled "Telescope Collimator Mk VI Checking Telescope Support for Telescope Mk. L" which doesn't really make a whole lot of sense all by itself. The seller's description says, "This is a Checking Telescope, that was used on the U.S.N. MK-9 Collimator system. It was used for setting the correct angles and alignment of the collimators that were attached to the collimator arms." which, it it's accurate, could imply that this might have been used as a tool for checking the alignment of the apparatus that would have been used for testing the arc error of nautical sextants --so two steps removed from a sextant itself. But it's really hard to say unless you could find someone who actually used one. I did some searching just now in the usual places, and they only returned this auction.


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