Watt's end measuring machine
1776
1776
1805
1889
1878-1867 (design)
1850-1900
1826-1894
1920-1939
1881
1893
1944
1913-1929
1920-1939
1922-1928
1900
1960
1801-1811
1801-1811
circa 1981
1930
circa 1900
circa 1960
1889
1924
1939
circa 1910
1826-1894
1884
circa 1882
earliest 1909
1876
1910-1940
1876
1955-1965
1930-1950
1745
1875
1856
1901
circa 1960