We have always considered and collected these commercial masks and helmets as industries tribal art. Examples can be elegant in their simplicity or bazaar and complex. They are always unique, suprising and filled with personality.
1930s Max Kuner Nautical Sextant
This is an untouched as found sextant. The case and its parts look complete with all 4 lenses. The case is signed... Max Kuner Nautical Optician, Chronometer and Watch Maker. Agent U.S. Government Charts, Seattle. The quality of a Max Kuner instrument was among the best. I'm guessing this tated from the late 1930s.