Photography, stereoscopy. Set of two Mexican type stereoscopic viewers "The Perfecscope" (missing). Are joined about fifty silver prints laminated on cardboard and captioned on mounts "The Perfec Stereograph ... Patented April 14, 1903 ...". (...) "H. C. White Co. Chicago, New York, London (...)". Subjects: events, mountain landscapes, portraits, cityscapes, Paris, bullfighting, monuments, etc. Size about 9 x 18 cm.