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Collection Overview
 
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Description
The Keystone-Mast Collection comprises over 350,000 stereoscopic photographs and negatives that depict the world between the late-nineteenth and mid-twentieth centuries. Firms represented in Keystone-Mast include Keystone View Company, Underwood and Underwood, B.W. Kilburn, H.C. White Company, Universal Photo Art Company (C.H. Graves), American Stereoscopic Company, W.H. Rau, Berry, Kelley and Chadwick, and George Rose. The photographs are not stereo cards, but contact prints from the original negatives, annotated by Keystone staff and photographers.
Extent
350,000 items