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Bubble Sextant
Catalogue number:
NASM 1963-68
Inscriptions:
"BUBBLE SEXTANT / U.S. NAVY / BUREAU OF STANDARDS / MODEL NO 2 / 1924"
Discussion:
This was designed by the Aeronautical Instruments Section of the National
Bureau of Standards and made Bausch & Lomb in 1924. The U.S. Naval
Observatory transferred it to the Smithsonian in 1948.
Further Information:
National Bureau of Standards
Aircraft Sextant
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