Signal Block Bell, South Eastern Railway
1862
1862
1850
1850-1859
1860
1845
1849
1855
1846-1859
1845
1842
1850
1865
1858
1848
1854
circa 1861
1934
1848-1852
1858
1860
circa 1861
1854
1857
1842
1845
1857-1858
1858
1851
1865
1857-1858
1858-03-02
1857-1858
1850-1859
1853
1865
1840
1852
1858
1849
1841
1851
1839
1955; 1830
1851
1850-1856
1860
1855-1860
2000-100 BCE
1843
1840-1860