Sterling Stereo Slide Viewer - Grey Marble - vintage / RefurbishedSterling Stereo Slide Viewer Grey Marble vintage Refurbished Condition: excellent, no chips nor cracks Imported into the U. S. from the Richard Verascope Company by the Chicago company, Busch Camera Company, branded under the name Sterling Stereo Viewer, the Sterling viewer embraces the design considered the most comfortable design for holding and use. Generally, the Grey Busch Stereoscopic Viewers and the Sterling Stereo Viewers differ only in the