
model sykes lock and block signalling system
1875
1875
1876
2000-100 BCE
1875
1877
1872 (original); 1909 (model)
1955; 1830
1875
1875
1876
1934
1893-4
1876
1877
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1839 (original); circa 1988 (replica)
1930 (replica); 1834 (original)
1830 (original); 1967 (model)
4000-2001 BCE
1990-96
1705-1737
1772 (original); 1919 (model)
1875
1888
1934
1875-1877
1876
1889-02
1876
1875
1972-3
2500 BCE
2000-1000
1880-120
1886-1866
2000-100 BCE
2000-1001 BCE
1877
1878-1839
1915-1825
1990-95
1901-950
1801-1825
1876
1713-1750
1800-1830
1801-1850
1800-1830
1692-1730