Originally Posted By: Russ
They sell cheap brass knock-offs online, but I wouldn't use one for actual navigation without extensive testing to see what it can do.

I handled a few. They are Ok for ornamental use. I wouldnīt use any of the ones I handled for actual navigation. All had alignment errors that could not be adjusted.

Originally Posted By: Russ

Does the cardboard sextant come with sun filters?

Yes, the cardboard one comes with a sun filter.
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If it isnīt broken, it doesnīt have enough features yet.