346 - 7 estereoscopios Holmes de madera. Principios del siglo XX (desgastados, con algunos defectos). 1. Estereoscopio «Eye Comfort» modelo 40, Keystone View Co., Meadville. - 2. Estereoscopio tipo Holmes, Underwood by Underwood, Nueva York, patentado el 11 de junio de 1901, montura de lentes de aluminio, asa - 3. Ica, Dresde, hacia 1918 (le faltan las lentes). - 4. Estereoscopios de madera con asas, sin marca del fabricante (3). - 5. Visor plegable sin marca. Ref. Paul Wing, *Stereoscopes. The first one hundred years*, Transition Publishing, 1996, pp. 156, 196.

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