A Negretti & Zambra Mahogany Stereoscopic Viewer, the cardholder with foliate fret piercing, on a swept rectangular plinth with ivorine manufacturer's plaque, 41cm long; and A White Metal Mounted Rosewood Box, inscribed Stereoscopic Slides, 22cm long (2). Stereoscopic viewer with splits to base and to cardholder. Cardholder loose in mount. Box with some splitting and with losses to stringing. Large split to base. All with some typical wear and scratching throughout.