4 Free Artworks of Warner And Swasey Company

united states naval observatory1873 works in the united statestelescopes containing lenses ground by alvan clark & sonsalvan clarkwarner & swasey companyalvan clark & sons
Lick Telescope 1889, 8 April 1889
james lick telescopelick observatory
USNO Refractor 1904, Alvan Clark, circa 1904
united states naval observatory1873 works in the united states
Usno-telescope-equalized-1, Alvan Clark
united states naval observatory1873 works in the united states
USNO26in-2, Alvan Clark
united states naval observatory1873 works in the united states
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