Aircraft Bubble Sextant, USSR, NAC-1M (SEXT19)
This is an early Cold-War-era aeronautical sextant from the former Soviet Union. Includes case, not shown.
According to collector George Fulford's notes:
No date on this one though the –1M indicates a later model as does the more refined finish on the sextant itself and the wooden box that it’s housed in. It doesn’t look like it’s had much use. A good show piece.
How it got there beats me, but there was this U.S. Army Signal Corps Tube RCA VT.99 inside. It might be something left over from the Lease/Lend of WW2 when we sent so much sophisticated supplies to them, so it’s staying with the sextant.