![](https://coimages.sciencemuseumgroup.org.uk/494/324/large_thumbnail_1994_7263_0001.jpg)
Signal Block Bell, South Eastern Railway
1862
1862
1898
1875
1898
1850
1850-1856
1850-1859
1864
1860
1850-1870
1886
1890-1894
1878-1890
1878-1890
1878-1890
1895
1863-7
1895
1855
1875
1884
1850
1865
1858
1886
1896
1890-1899
1855-1860
2000-100 BCE
1854
1870-1880
1880-1889
1856
1881
1850-1890
1878-1890
1878-1890
1893-4
1870
1861-1866
1885-1895
1870s
1875-1885
1880-1890
circa 1885
1878
About 1890
circa 1861
1894
1872-1880