NavList:

"Does anyone recognize this aircraft sextant?

http://www.maurnavy.com/aircraft/big/066_1sextant.jpg

It looks like an octant, similar to a Link A-12."

Like several Russian sextants, the resemblance is closer to a German model:

http://www.nmm.ac.uk/collections/explore/object.cfm?ID=NAV1212&picture=2#content

This is A12:

http://www.worthpoint.com/worthopedia/a-12-link-bubble-sextant-1943

The A12 may have a common ancestry, but has scopes that don't require looking down quite as much and a manual averaging scheme (triggered pencil marks on the white drum) rather than the clockwork averager on the German and presumably the Russian one.

If you can find/fix (there is help) a British Mark IXA (or IX-BM), you may get better value -- I've seen one go, apparently working, on eBay for less than £70 ($100 US). On the other hand, many of them are incomplete or beat-up. I have a sextant from the outfit your link references, maurnavy.com, waiting on British customs, and so far he seems good to deal with, and that picture seems to show a clean sextant.

Don't be surprised at shipping charges outside your trading area, especially since you want good service for a sextant. I'm always shocked at shipping into the EU. On top of 20% duty, it can be discouraging. I saw a Mark IX from Canada, for example, if you live in the US.

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