Unidentified photographer / artist 1876 (patent) PICTURE EXHIBITOR, patented by George A. Lauer, January 19,1876 Stereographica - Antique Photographica Courtesy of Bryan and Page Ginns (#17 / 34)
This clever revolving style viewer is designed to hold 48 Cartes de Visite back to back in 24 holders. The revolving mechanism is similar in principal to Beckers style stereoscopes.
