![](https://coimages.sciencemuseumgroup.org.uk/15/70/large_thumbnail_pic_1890_87.jpg)
Ramsbottom speed indicator
1860
1860
1863-7
1855
1858
1855-1860
2000-100 BCE
1854
1856
1893-4
1855
1934
1858
1860
1854
1857
1860
1857-1858
1858
1857-1858
1858-03-02
1857-1858
circa 1854
circa 1854
1855
1858
1955; 1830
1859
circa 1860
before 1857
1854
1860
1772 (original); 1919 (model)
1801-1840 (original); 1901 (model)
1775-1799 (original); 1900-1907 (model)
1858
1855
1930 (replica); 1834 (original)
1855
1986 (replica); 1501-1600 (original)
1858
1934
1857
after 1859
1705-1737
1859
circa 1860
1870-1877
1858
1857
1856