Wwii Poster, 1942 #4
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Alfred Nobel (1833-1896) #3
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George Stephenson (1781-1848)
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John Wilkinson (1728-1808)
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James Watt (1736-1819) #19
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James Watt (1736-1819) #20
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William Jackson Palmer (1836-1909)
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James Nasmyth (1808-1890) #1
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George Stephenson (1781-1848) #2
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John Ericsson (1803-1889) #3
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Severino Grattoni (1815-1876)
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John Logie Baird (1888-1946) #1
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Henryk Dembinski (1791-1864)
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Sir William Siemens (1823-1883) #1
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James Watt (1736-1819) #18
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James Buchanan Eads (1820-1887)
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Civil War Engineers, 1864
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Railroad Engineers, 1888
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New Jersey Rahway, 1844
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New Jersey Rahway, 1844 #1
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Alexandre Gustave Eiffel (1832-1923)
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Soho Engineering Works #2
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Labor Certificate, 1877
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New York Railroad, 1832
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George Stephenson (1781-1848) #1
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Philadelphia Railroad
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Eustachio Zanotti (1709-1782)
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Sebastien De Vauban (1633-1707)
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Matthew Boulton (1728-1809) #1
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Richard Delafield (1798-1873)
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Sir Marc Isambard Brunel (1769-1849)
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Sir Marc Isambard Brunel (1769-1849) #1
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Sadi Carnot (1796-1832) #1
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Charles Francis Brush (1849-1929)
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John Milne (1850-1913)
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Jacques-constantin Perier (1472-1818)
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John Loudon Mcadam (1756-1836) #1
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Catapult, 14th Century
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Ballista, 14th Century
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William Strickland (1787?-1854)
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World War I Trenches
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World War I Trenches #3
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World War I Cavalry #7
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World War I Cavalry #8
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Sir Sandford Fleming (1827-1915)
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Robert Fulton (1765-1815) #12
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Robert Fulton (1765-1815) #13
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Robert Fulton (1765-1815) #14
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Ferdinand Rudolph Hassler (1770-1843)
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Robert Fulton (1765-1815) #15
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Christopher Colles (1739-1816)
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Poster Recruitment, 1919
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World War 2 - Color Guard, C1943 #1
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Andrew A. Humphreys
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