Telescope
circa 19th century
circa 19th century
circa late 18th century
circa late 18th century
circa 1784-1810
1846-1870
1825
circa 19th century
1817
1814
1845
circa 1850
1918-1920
1900-1905
circa 1930s
1887-1889
circa 1910s
circa 1840s
circa 1890s
1780-1785
circa 1900s
circa 1930s
1868-1870
1880s
1950s-1960s
1960s
1930s
1896-12-30
circa 1850
circa 1860
1976-06-23
1976-06-25
1763-03-28
1854
1977-08-04
1976-07-08
1819-02-21
1964
1774-12-03
1866-04-02
circa 1850
circa 1920–1930
undated
1832
1870-05-19
1842
1850 or 1851
1870-07-01
circa 1844-1850
undated
1864-1865
1970
1887-10-01
circa 1812-1819
1927-01
circa 1950-1960
circa 1900-1920
circa 1950-1970
1848
Late 1960s
1864-03-25