Unidentified photographer / artist n.d. HOLMES-BATES stereoscope on a Bush patented stand Stereographica - Antique Photographica Courtesy of Bryan and Page Ginns (#17 / 17)
The viewer has a brass label indicating the maker as "Joseph L. Bates, Boston. Patented Aug. 13, 1867". The viewer completely detaches from the stand for hand held use. Refer Wing, page 91 for an illustration of a similar viewer.