
Webb's "Adder", patented 1889, with cover
1889-1900
1889-1900
1895
1891
1891
circa 1896
1890-1900
1893-1900
1890-1900
circa 1893
circa 1893
circa 1893
circa 1893
1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
1890s
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
circa 1893
1894
1896
circa 1900
1895
1888
1896
1893
circa 1900