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No worries Alex.

I cannot comment on the AN 5851 so you will have to go on the word of the
others. I do, however, suggest that if you are going to spend the $$$ on
one, you are best to avoid e-bay unless the e-bay seller is also a reputable
nautical instrument dealer and/or if you know someone who could take an old
clunker and refurbish it. This would also mean that the repairman would have
to have access to spare parts too.

The reason why I am so enthusiastic about the MK IX is because I believe
that it has an excellent bubble system. Geoffrey Kolbe brought up some valid
and indisputable points about its shortcomings although do not believe it is
any more clunky than other bubble sextants. The MK IX is complex, does not
lend itself  to calibration and repair by the user, however, I believe this
is also true of most other bubble sextants. But it is the MK IX bubble
system that, in my opinion, makes it superior to the other bubble sextants
that I have used.

It is best if you phone Robert E. White directly and speak to Ridge White.
They often have sextants that have not yet been posted on their website.

I mention Ken Gebhart simply because he appears to be very much connected to
the industry. If anyone can get an oddball item, I suggest it would be Ken.

The late John Luykx, who was a regular contributor to the Navigator's
Newsletter and one of the Navigation Foundation's directors, ran a company
called "Infocenter" and specialized in bubble sextant sales. I do not know
if this firm has been carried on by John's partner but I can try to find
out. I do know that he had several different types of aircraft sextants for
sale, all of which were overhauled and refurbished.

I will keep searching through my old files to see if I can locate other
sources, although I regret to add that I suspect that most of these have
disappeared long ago. GPS is king.

Robert


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