It used to be good sextants came with one of these. They were also called clear tubes, and hooded peep sights. Having no lenses, they will not fog or smudge from ocean spray.
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Astra Zero Magnification Sight Tube
Original price was: $22.40.$15.60Current price is: $15.60.
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SextantsAstra III Pro Sextant [0501P] Whole / Full Horizon
Original price was: $719.40.$517.99Current price is: $517.99. Add to cart -
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SextantsThe Nautical Sextant
Original price was: $27.97.$17.67Current price is: $17.67. Add to cart