11 science and tech artifacts that are up for grabs

Manhattan Project viewing window. Estimated auction value: $150,000 to $200,000. (Image courtesy of Bonhams)

Apple 1 Computer, built in 1976. (Image courtesy of Bonhams.)

Charles Darwin letter to Charles Spence Bate on the subject of barnacle reproduction, 1857. (Image courtesy of Bonhams)

Helmholtz Sound Synthesizer c. 1905. (Image courtesy of Bonhams)

Armillary sphere and terrestrial globe, 1834. (Image courtesy of Bonhams)

One of the only known copies of astronomer Johannes Kepler's 'Tabulae Rudolphinae, quibus Astronomicae scientiae, temporum longinquitate collapsae Restauratio continetur,' 1637. (Image courtesy of Bonhams)

Large reflecting telescope, c. 1870. (Image courtesy of Bonhams)

Photograph of the Morehouse Comet, 1908. (Image courtesy of Bonhams)

Magic lantern, c. 1890. (Image courtesy of Bonhams)

Letter from Albert Einstein to his friend and colleague, the philosopher of science Dr. Hans Reichenbach, 1926. (Image courtesy of Bonhams)

Bonhams is auctioning the extensive archive of pioneering astronomer, photographer, and telescope designer George Willis Ritchey, c. 1895-1935. The archive includes 80 glass plates and 283 vintage photographs of "celestial phenomena," as well as manuscripts and 150 glass slides used by Ritchey in a series of lectures. (Image courtesy of Bonhams)