![](https://coimages.sciencemuseumgroup.org.uk/396/59/large_thumbnail_1900_0156__0009_.jpg)
100 Link Steel Surveying Chain, 1784.
1784
1784
1990-1991
1663
1750-1766
1775-1794
1600-1630
1755-1765
1600-1630
1791
1940
1795-1805
1710-1720
1851-1900
1920
1840
1830
1850-1899
1914
1822
1827
1940
1864
1825
1801-1850
1875
1950
1960
1970
1944
1800
1894
1997
circa 1947
circa 1855
1850-1900
1970-1975
1920