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I would be leery of any sextant that has been "re-assembled". I
visualize a dealer who has four damaged sextants and wants to make
two or three good ones out of them. Switching mirrors or scopes are
no problem, but switching the arm (alidade), or micrometer drum would
completely negate the original test certificate.

Ken gebhart
On Mar 31, 2012, at 4:22 PM, Alan S wrote:

> Bill:
>
> As you note, reputable makers are certainly capable of making
> mistakes, but why would Russian sextants be assembled in India?
>
> Also, and I admit to being rather LESS than a sextant expert,
> reversing of the horizon mirror seems hard to take, assuming, and
> this might be a giant "leap of faith", people with proper
> mechanical skills, and some knowlege of what a properly aassembled
> sextant looks like were involved. Then, what of what passes for
> quality control in the assembly plant, and finally assuming that an
> easily detectable problem got through, what sort of less obvious,
> but serious defects might there be? Who knows, but given that these
> instrruments, these days, bring pretty good prices, along with
> hefty shipping charges, are they any sort of a bargain?
>
> I don't know, but I do wonder.
>
> Alan
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