![](https://coimages.sciencemuseumgroup.org.uk/494/324/large_thumbnail_1994_7263_0001.jpg)
Signal Block Bell, South Eastern Railway
1862
1862
1906
1898
1902
1901
1875
1909
1906
1898
1850
1850-1856
1850-1859
1864
1860
1850-1870
1886
1850-1900
1890-1894
1904
1878-1890
1878-1890
1878-1890
1895
circa 1905
1863-7
1895
1855
1875
1884
1850
1901
1901
1865
1858
1886
1896
1901
1890-1899
1855-1860
2000-100 BCE
1854
1850-1900
1870-1880
1880-1889
1850-1900
1856
1850-1900
1881
1850-1900
1900-1909