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    Mark 15 sextants
    From: Gord Cudlipp
    Date: 2018 Oct 26, 11:05 -0700

    I recently acquired a Davis Mark 15 sextant but this sextants is a little different than other Mark 15s that l have used. It has a small lens that folds over the clear portion of the horizon lens. I have attached a picture of the sextant. Can anyone tell what this lens is for?

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