model sykes lock and block signalling system
1875
1875
1872
1875
1872 (original); 1909 (model)
1955; 1830
1875
1872
1871
circa 1871
1934
2000-100 BCE
1893-4
1875
1705-1737
1872
1888
1930 (replica); 1834 (original)
1873
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1872
1871
1874
1871
1875
1990-96
1934
1830 (original); 1967 (model)
1872
1873
4000-2001 BCE
1874
10000-5000 BCE
1910-130
1875
1872
1872
1872
1873
1875
1873
before 1874
1874
before 1873
1872
1713-1750
before 1874
1871
1800-1830