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Double Gyroscope Apparatus, with components
1890
1890
circa 1883
1888
1857
1890
circa 1890
circa 1883
circa 1883
1913
circa 1948
1913
circa 1890
1888
1857
1888
1913
circa 1889
1868
1908
circa 1883
1868
circa 1902
1883
1868
circa 1883
1868
1868
1888
circa 1884
Unknown
circa 1954
1876
1868
1913