Bidspirit auction | ANTIQUE KEYSTONE VIEW COMPANY STEREOSCOPE

ANTIQUE KEYSTONE VIEW COMPANY STEREOSCOPE CARDS - Several boxes with antique stereoscope cards including charts from Keystone View Company Series 1 – Base Out Children's Stories, the Dvorine Animated Fusion Training charts produced in 1951 are a diagnostic set of charts for the measurement of lateral and vertical fusional amplitudes, more cards with historic views, landscape pictures and nature scenes. Dimensions: N/A