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Stereographic card viewer
Technology
Maker: H.S. Walbridge and Co
Wooden (likely maple) framed stereoscope viewer consisting of a central wooden spine, to which is attached a folding, turned wooden handle, a sliding viewing frame for holding the stereo cards, and a ...REL41825
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US Navy aircraft protractor Mk III B: Flight Lieutenant E L Bayly, RAAF
Technology
US Navy aircraft protractor Mk III B. The protractor consists of two pivoting plotting arms with steel belts to maintain orientation, and a compass dial marked with degrees. It is contained in the ori...REL23814